Because you like Wreck-It Ralph in Wreck-It Ralph

Did he ever tell you the definition of insanity? Just wait, and this psychopath will do just that. See them in Far Cry 3.

This high school queen bee has everything, including a genius-level IQ—a fact Lydia Martin keeps hidden to maintain her image. See them in Teen Wolf.

Known as the "rat king" of Paddy's Pub, bartender Charlie Kelly spends most of his time drinking at his bar instead of serving drinks to customers. See them in It's Always Sunny in Philadelphia .

Artemis Fowl understands the way of the world. If he wins, he's a prodigy. If he loses, then he's crazy. That is how history is written. See them in Artemis Fowl.

Pro: Johan Liebert is handsome and charming. Con: he's also a sociopathic killer. See them in Monster (TV Show).

It’s usually the good-looking, charismatic, play-by-their-own-rules types that get everyone into trouble, and Tyler Durden is Exhibit A. See them in Fight Club.

You wouldn't know it by looking at her, but beneath Sheila Jackson's sweet, motherly exterior lies a sex addict. See them in Shameless.

Sabriel is smart enough to understand the dangers that await her and brave enough to face them anyway. See them in Abhorsen Series.

Ben Barber is ready to show you that he's twice the man you think he is. See them in Ride Along.

Don't let his old age fool you, Heihachi Mishima is a ruthless pragmatist who values self-reliance above all else. See them in Tekken .

With a unique ability to empathize with killers, Will Graham helps society but his sanity pays the price. See them in Hannibal.