Because you like Sam Witwicky in Transformers

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

He's a troubled insomniac in search of a moment to rest and a meaning to his existence. See them in Fight Club.

A responsible kid, Hugo Cabret is still capable of flights of fancy. See them in Hugo.

A sweet princess , Giselle is about to realize that life is no fairy tale. See them in Enchanted.

A brilliant "extractor," Dom Cobb has spent the past few years running from the authorities and his inner demons. See them in Inception.

Beware! Anton Chigurh carries a coin with him, which he forces his victims to flip to decide whether they will live or die. See them in No Country for Old Men.

Yoda is wise, patient, and capable of kicking ass. He's done his best to mentor young Jedi and protect the balance of Light and Dark. See them in Star Wars Series.

Told her son will one day save the world, Sarah Connor dedicates her life to training him to do just that. See them in The Terminator.

Alex DeLarge likes his favorite milk-based, drug-laced cocktail. It helps him get in the mood for a night of "ultra violence." See them in A Clockwork Orange.

Scott Pilgrim's superhero suit is just a video game t-shirt and sweatbands. But this slacker is brave enough to fight all his girlfriend's evil exes. See them in Scott Pilgrim vs. the World.

Though seemingly caring and calm, this motel owner has a mysterious streak of intensity. See them in Psycho.