Because you like Kyle Reese in The Terminator
Knuckles the Echidna is a 16-year-old red echidna (aka a spiny anteater) and guardian of the ancient Master Emerald. See them in Sonic the Hedgehog.
Charles Xavier is a telepath who believes mutants and humans are both good at heart and can live in harmony. See them in X-Men Series.
Lelouch vi Britannia is a high school student by day, masked destroyer of tyrannical empires by night. See them in Code Geass.
Megamind is searching for purpose in a supervillain life without a superhero to fight. See them in Megamind.
This isn't the Captian Hook of your nightmares; he's charming and devilishly handsome. See them in Once Upon a Time.
A hurricane of a human being, Marla Singer is destructive and unforgettable. See them in Fight Club.
When a half-breed breaks the rules, John Constantine deports them straight back to hell. He's trying to buy his way into heaven. See them in Constantine.
Although Thomas Sharpe is an English baronet, he doesn't have a Shilling to his name. He's in America to sell his invention and marry rich. See them in Crimson Peak.
After years of living vicariously through other people's heroic stories, Wade Watts is about to become a hero himself. See them in Ready Player One.