Best Anime of each Year 2000 - 2015

One Punch Man - 2015 - Best Anime of each Year 2000 - 2015

One Punch Man - 2015

The seemingly ordinary and unimpressive Saitama has a rather unique hobby: being a hero. In order to pursue his childhood dream, he trained relentlessly for three years—and lost all of his hair in the process. Now, Saitama is incredibly powerful, so much so that no enemy is able to defeat him in battle. In fact, all it takes to defeat evildoers with just one punch has led to an unexpected problem—he is no longer able to enjoy the thrill of battling and has become quite bored.

This all changes with the arrival of Genos, a 19-year-old cyborg, who wishes to be Saitama's disciple after seeing what he is capable of. Genos proposes that the two join the Hero Association in order to become certified heroes that will be recognized for their positive contributions to society, and Saitama, shocked that no one knows who he is, quickly agrees. And thus begins the story of One Punch Man, an action-comedy that follows an eccentric individual who longs to fight strong enemies that can hopefully give him the excitement he once felt and just maybe, he'll become popular in the process.
Zankyou no Terror - 2014 - Best Anime of each Year 2000 - 2015

Zankyou no Terror - 2014

Painted in red, the word "VON" is all that is left behind after a terrorist attack on a nuclear facility in Japan. The government is shattered by their inability to act, and the police are left frantically searching for ways to crack down the perpetrators. The public are clueless—until, six months later, a strange video makes its way onto the internet. In it, two teenage boys who identify themselves only as "Sphinx" directly challenge the police, threatening to cause destruction and mayhem across Tokyo. Unable to stop the mass panic quickly spreading through the city and desperate for any leads in their investigation, the police struggle to act effectively against these terrorists, with Detective Kenjirou Shibazaki caught in the middle of it all.

Zankyou no Terror tells the story of Nine and Twelve, the two boys behind the masked figures of Sphinx. They should not exist, yet they stand strong in a world of deception and secrets while they make the city fall around them, all in the hopes of burying their own tragic truth.
Yahari Ore no Seishun Love Comedy wa Machigatteiru - 2013 - Best Anime of each Year 2000 - 2015

Yahari Ore no Seishun Love Comedy wa Machigatteiru - 2013

Hachiman Hikigaya is an apathetic high school student with narcissistic and semi-nihilistic tendencies. He firmly believes that joyful youth is nothing but a farce, and everyone who says otherwise is just lying to themselves.

In a novel punishment for writing an essay mocking modern social relationships, Hachiman's teacher forces him to join the Volunteer Service Club, a club that aims to extend a helping hand to any student who seeks their support in achieving their goals. With the only other club member being the beautiful ice queen Yukino Yukinoshita, Hachiman finds himself on the front line of other people's problems—a place he never dreamed he would be. As Hachiman and Yukino use their wits to solve many students' problems, will Hachiman's rotten view of society prove to be a hindrance or a tool he can use to his advantage?
Psycho Pass - 2012 - Best Anime of each Year 2000 - 2015

Psycho Pass - 2012

Justice, and the enforcement of it, has changed. In the 22nd century, Japan enforces the Sibyl System, an objective means of determining the threat level of each citizen by examining their mental state for signs of criminal intent, known as their Psycho-Pass. Inspectors uphold the law by subjugating, often with lethal force, anyone harboring the slightest ill-will; alongside them are Enforcers, jaded Inspectors that have become latent criminals, granted relative freedom in exchange for carrying out the Inspectors' dirty work.

Into this world steps Akane Tsunemori, a young woman with an honest desire to uphold justice. However, as she works alongside veteran Enforcer Shinya Kougami, she soon learns that the Sibyl System's judgments are not as perfect as her fellow Inspectors assume. With everything she has known turned on its head, Akane wrestles with the question of what justice truly is, and whether it can be upheld through the use of a system that may already be corrupt.
Steins;Gate - 2011 - Best Anime of each Year 2000 - 2015

Steins;Gate - 2011

The self-proclaimed mad scientist Rintarou Okabe rents out a room in a rickety old building in Akihabara, where he indulges himself in his hobby of inventing prospective "future gadgets" with fellow lab members: Mayuri Shiina, his air-headed childhood friend, and Hashida Itaru, a perverted hacker nicknamed "Daru." The three pass the time by tinkering with their most promising contraption yet, a machine dubbed the "Phone Microwave," which performs the strange function of morphing bananas into piles of green gel.

Though miraculous in itself, the phenomenon doesn't provide anything concrete in Okabe's search for a scientific breakthrough; that is, until the lab members are spurred into action by a string of mysterious happenings before stumbling upon an unexpected success—the Phone Microwave can send emails to the past, altering the flow of history.

Adapted from the critically acclaimed visual novel by 5pb. and Nitroplus, Steins;Gate takes Okabe through the depths of scientific theory and practicality. Forced across the diverging threads of past and present, Okabe must shoulder the burdens that come with holding the key to the realm of time.
Shiki - 2010 - Best Anime of each Year 2000 - 2015

Shiki - 2010

Fifteen-year-old Megumi Shimizu dreamed of a glamorous life in the big city; however, her unexpected death in the quiet village of Sotoba marks the beginning of what appears to be a ferocious epidemic that turns the hot summer into a season of blood and terror. A young doctor named Toshio Ozaki begins to doubt the nature of the disease and comes to understand that to discover the truth, he must abandon his humanity. Meanwhile, Natsuno Yuuki, an antisocial youth from the city, is haunted by the sudden death of Megumi and must realize the pain of friendship in the face of his own tragedy. Toshio and Natsuno form an unlikely pair as they work together to save Sotoba before it transforms into a ghost town of vampires.

Shiki, adapted from the horror novel written by Fuyumi Ono, goes beyond the average vampire story. It tells the tragic tale of survival in a world where one cannot easily distinguish between good and evil. Abandoned by God, the Shiki, as the vampires call themselves, have only their will to live as they clash with the fear of the paranoid/unbelieving villagers. Shiki explores the boundary that separates man from monster.
Fullmetal Alchemist: Brotherhood - 2009 - Best Anime of each Year 2000 - 2015

Fullmetal Alchemist: Brotherhood - 2009

"In order for something to be obtained, something of equal value must be lost."

Alchemy is bound by this Law of Equivalent Exchange—something the young brothers Edward and Alphonse Elric only realize after attempting human transmutation: the one forbidden act of alchemy. They pay a terrible price for their transgression—Edward loses his left leg, Alphonse his physical body. It is only by the desperate sacrifice of Edward's right arm that he is able to affix Alphonse's soul to a suit of armor. Devastated and alone, it is the hope that they would both eventually return to their original bodies that gives Edward the inspiration to obtain metal limbs called "automail" and become a state alchemist, the Fullmetal Alchemist.

Three years of searching later, the brothers seek the Philosopher's Stone, a mythical relic that allows an alchemist to overcome the Law of Equivalent Exchange. Even with military allies Colonel Roy Mustang, Lieutenant Riza Hawkeye, and Lieutenant Colonel Maes Hughes on their side, the brothers find themselves caught up in a nationwide conspiracy that leads them not only to the true nature of the elusive Philosopher's Stone, but their country's murky history as well. In between finding a serial killer and racing against time, Edward and Alphonse must ask themselves if what they are doing will make them human again... or take away their humanity.
Ookami to Koushinryou - 2008 - Best Anime of each Year 2000 - 2015

Ookami to Koushinryou - 2008

Holo is a powerful wolf deity who is celebrated and revered in the small town of Pasloe for blessing the annual harvest. Yet as years go by and the villagers become more self-sufficient, Holo, who stylizes herself as the "Wise Wolf of Yoitsu," has been reduced to a mere folk tale. When a traveling merchant named Kraft Lawrence stops at Pasloe, Holo offers to become his business partner if he eventually takes her to her northern home of Yoitsu. The savvy trader recognizes Holo's unusual ability to evaluate a person's character and accepts her proposition. Now in the possession of both sharp business skills and a charismatic negotiator, Lawrence inches closer to his goal of opening his own shop. However, as Lawrence travels the countryside with Holo in search of economic opportunities, he begins to realize that his aspirations are slowly morphing into something unexpected.

Based on the popular light novel of the same name, Ookami to Koushinryou, also known as Spice and Wolf, fuses the two polar genres of economics and romance to create an enthralling story abundant with elaborate schemes, sharp humor, and witty dialogue. Ookami to Koushinryou is more than just a story of bartering; it turns into a journey of searching for a lost identity in an ever-changing world.
Baccano - 2007 - Best Anime of each Year 2000 - 2015

Baccano - 2007

During the early 1930s in Chicago, the transcontinental train, Flying Pussyfoot, is starting its legendary journey that will leave a trail of blood all over the country. At the same time in New York, the ambitious scientist Szilard and his unwilling aide Ennis are looking for missing bottles of the immortality elixir. In addition, a war between the mafia groups is getting worse. On board the Advena Avis, in 1711, alchemists are about to learn the price of immortality.

Based on the award-winning light novels of the same name, Baccano! follows several events that initially seem unrelated, both in time and place, but are part of a much bigger story—one of alchemy, survival and immortality. Merging these events together are the kindhearted would-be thieves, Isaac and Miria, connecting various people, all of them with their own hidden ambitions and agendas, and creating lifelong bonds and consequences for everyone involved.
Code Geass: Hangyaku no Lelouch - 2006 - Best Anime of each Year 2000 - 2015

Code Geass: Hangyaku no Lelouch - 2006

In the year 2010, the Holy Empire of Britannia is establishing itself as a dominant military nation, starting with the conquest of Japan. Renamed to Area 11 after its swift defeat, Japan has seen significant resistance against these tyrants in an attempt to regain independence.

Lelouch Lamperouge, exiled prince of Britannia, unfortunately finds himself caught in a crossfire between the two nations' armed forces. He is able to escape, however, thanks to the timely appearance of a mysterious girl named C.C., who bestows upon him Geass, the "Power of Kings." Realizing the vast potential of his newfound "power of absolute obedience," Lelouch embarks upon a perilous journey as the masked vigilante known as Zero, leading a merciless onslaught against Britannia in order to get revenge once and for all.
Eureka Seven - 2005 - Best Anime of each Year 2000 - 2015

Eureka Seven - 2005

In the backwater town of Bellforest lives a 14-year-old boy named Renton Thurston. He desires to leave his home behind and join the mercenary group known as Gekkostate, hoping to find some adventure to brighten up his mundane life. However, stuck between his grandfather's insistence to become a mechanic like him and the pressure of his deceased father's legacy, the only excitement Renton finds is in his pastime of riding the Trapar wave particles that are dispersed throughout the air, an activity akin to surfing.

Everything changes when an unknown object crashes through Renton's garage, discovered to be a Light Finding Operation—a robot capable of riding the Trapar waves—specifically known as the Nirvash typeZERO. Its pilot is a young girl named Eureka, a member of the Gekkostate, who requests a tune-up for the Nirvash. Their meeting sparks the beginning of Renton's involvement with the Gekkostate as he takes off alongside Eureka as the co-pilot of the Nirvash.
Monster - 2004 - Best Anime of each Year 2000 - 2015

Monster - 2004

Dr. Kenzou Tenma is a renowned brain surgeon of Japanese descent working in Europe. Highly lauded by his peers as one of the great young minds that will revolutionize the field, he is blessed with a beautiful fiancée and is on the cusp of a big promotion in the hospital he works at. But all of that is about to change with a grave dilemma that Kenzou faces one night—whether to save the life of a small boy or that of the town's mayor. Despite being pressured by his superiors to perform surgery on the mayor, his morals force him to perform the surgery on the other critical patient, saving his life and forfeiting the mayor's. A doctor is taught to believe that all life is equal; however, when a series of murders occur in the surgeon's vicinity, all of the evidence pointing to the boy he saved, Kenzou's beliefs are shaken. Along his journey to unravel the true identity of his little patient, Kenzou discovers that the fate of the world may be intertwined with the mysterious child.
Texhnolyze - 2003 - Best Anime of each Year 2000 - 2015

Texhnolyze - 2003

Texhnolyze takes place in the city of Lux, a man-made underground city that has crumbled after years of neglect and lack of repairs. Citizens of Lux have come to refer to their home as simply "The City" and treat it as though it has a mind and will of its own. Three major factions battle to control Lux: Organo, a group of "professionals" who collaborate with the criminal underworld that controls Texhnolyze (prosthetics), the Salvation Union, a populist group that seeks to disrupt Organo's business, and Racan, a collection of young individuals with Texhnolyzes that use their abilities for personal gain.

Ichise was once an orphan who has made a place for himself in Lux as a prize fighter. One day, a fight promoter grows angry with him and the altercation that follows results in Ichise losing an arm and a leg. Before death can take him, Ichise is found by the scientist Eriko Kamata, who uses him as a test subject for her newly designed Texhnolyze. With these powerful new limbs at his disposal, Ichise begins to work for Oonishi, the leader of Organo. He soon meets a mysterious young girl, Ran, who has the power to see possible futures. Together, they soon realize that Lux is on the brink of war and collapse, and that they may be the only ones who can save The City.
Ghost in the Shell: Stand Alone Complex - 2002 - Best Anime of each Year 2000 - 2015

Ghost in the Shell: Stand Alone Complex - 2002

In the not so distant future, mankind has advanced to a state where complete body transplants from flesh to machine is possible. This allows for great increases in both physical and cybernetic prowess and blurring the lines between the two worlds. However, criminals can also make full use of such technology, leading to new and sometimes, very dangerous crimes. In response to such innovative new methods, the Japanese Government has established Section 9, an independently operating police unit which deals with such highly sensitive crimes.

Led by Daisuke Aramaki and Motoko Kusanagi, Section 9 deals with such crimes over the entire social spectrum, usually with success. However, when faced with a new A level hacker nicknamed "The Laughing Man," the team is thrown into a dangerous cat and mouse game, following the hacker's trail as it leaves its mark on Japan.
Hikaru no Go - 2001 - Best Anime of each Year 2000 - 2015

Hikaru no Go - 2001

12-year-old Shindou Hikaru is just your average 6th grader. One day, while searching through his grandfather's attic, he comes across an old Go board. Upon touching the Go board, Hikaru is possessed by the spirit of Fujiwara no Sai, and continues to be haunted by him soon after. Sai was once a great Go player, who committed suicide and continued to stay in the world as a spirit desiring only to play Go once again. Finally bending to Sai's pleas, Hikaru allows Sai to play Go through himself, unknowingly attempting the first game with the young prodigy Touya Akira. Time has finally started moving, as Sai's quest for the perfect game, "The Hand of God", is set underway. Based on the manga by Yumi Hotta and Takeshi Obata.
Hajime no Ippo - 2000 - Best Anime of each Year 2000 - 2015

Hajime no Ippo - 2000

Makunouchi Ippo has been bullied his entire life. Constantly running errands and being beaten up by his classmates, Ippo has always dreamed of changing himself, but never has the passion to act upon it. One day, in the midst of yet another bullying, Ippo is saved by Takamura Mamoru, who happens to be a boxer. Ippo faints from his injuries and is brought to the Kamogawa boxing gym to recover. As he regains consciousness, he is awed and amazed at his new surroundings in the gym, though lacks confidence to attempt anything. Takamura places a photo of Ippo's classmate on a punching bag and forces him to punch it. It is only then that Ippo feels something stir inside him and eventually asks Takamura to train him in boxing. Thinking that Ippo does not have what it takes, Takamura gives him a task deemed impossible and gives him a one week time limit. With a sudden desire to get stronger, for himself and his hard working mother, Ippo trains relentlessly to accomplish the task within the time limit. Thus Ippo's journey to the top of the boxing world begins.
Rules - Best Anime of each Year 2000 - 2015

Rules

I'd like to give credit to MAL (Myanimelist.net) for the detailed synopsis' they've provided.

If you're wondering about 2016 it's (in my opinion) Re:Zero so far who holds the title, but let's wait and see what happens.