Because you like The Janitor in Scrubs

Sheldon Cooper is brilliant in every way except, well, interacting with any human being. See them in The Big Bang Theory.

While Alan Garner is loyal to his new friends, his efforts to help them often do more harm than good. See them in The Hangover.

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.

As an undercover cop, Schmidt is getting to relive high school as a cool kid. See them in 21 Jump Street.

Even the smallest person can change the course of the world, if he's brave enough. See them in The Lord of the Rings.

A suave womanizer, Jacob Palmer has turned seduction into a science. See them in Crazy, Stupid Love.

Irene Adler has to use both her brains and her body to survive. Luckily, she's usually the most brilliant person in the room. See them in Sherlock.

Larger than life and wealthy beyond measure, Willy Wonka is more than a titan in the sweets industry; he is an arbiter of taste. See them in Charlie and the Chocolate Factory.

Think you grew up fast? At 12, Mathilda is an aspiring assassin eager to avenge her family's murder. See them in Leon: The Professional.

Though the weight of a secret robs her of her voice, Melinda is nevertheless artistic, intelligent, and empathetic. See them in Speak .

A skating genius, Victor Nikiforov dazzles women and men with a single glance. But deep down he's a cheerful goof. See them in Yuri on Ice.