Because you like Regan MacNeil in The Exorcist

Bad-ass Rayne has sworn her life to finding and destroying her vampire dad, Kagan, and killing as many other vampires as she can in the bargain. See them in BloodRayne .

Despite Norman Bates' typically kind and shy personality, he is also prone to occasional violent outbursts. See them in Bates Motel.

Green skin, pointy hat, evil cackle—this villain has it all! See them in The Wizard of Oz.

A sarcastic and nosy tomboy, Stephanie Tanner is understandably not crazy about being the middle child. See them in Full House.

Dash Parr's super speed helps with his impatience. See them in The Incredibles.

Paulie Bleeker is shy, sweet, and super into orange tic-tacs. See them in Juno.

A born psychopath, don't expect Michael Myers to understand the difference between right and wrong. See them in Halloween.

Roger is a pansexual alcoholic non-human who will happily lie, cheat and steal to get what he wants. See them in American Dad!.

Leatherface's moods change with his masks. See them in The Texas Chainsaw Massacre.

A jealous woman is dangerous. A jealous assassin woman like Elle Driver is even more so. See them in Kill Bill vol. 1.

Breaking bones and hearts, Callie Torres has figured out how to put the bones back together. But the hearts? Not so much. See them in Grey's Anatomy.

Count Olaf is a traveling actor, except he can't act and his homicidal tendencies make finding work pretty difficult. See them in Lemony Snicket's A Series of Unfortunate Events.