Because you like Marla Singer in Fight Club

Herion is Mark Renton's favorite drug. He sniffs it, smokes it, swallows it, sticks it up his arse, and injects it into his veins. See them in Trainspotting.

Tattoos, bad boys, and heroin: Jane Margolis is learning that some vices are more dangerous than others. See them in Breaking Bad.

Vincent Vega likes a good steak, a cheap milkshake, and killing a target without anything going wrong. See them in Pulp Fiction.

Cynical, judgmental, and hipper-than-thou, Enid Coleslaw wears her outsider status like a badge of honor. See them in Ghost World.

Don't ask the ruthless queen of the Tokyo underworld any questions unless you're fine with losing a limb. See them in Kill Bill vol. 1.

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

Sensual, wild, and with a penchant for controlled substances, Lily is a ballet dancer who isn't afraid to let loose. See them in Black Swan.

Blunt but anxious, Gretchen Ross bonds most easily with those who have lived tough lives like she has. See them in Donnie Darko.

Kim Kelly is a high school bully who's normally in a bad mood. But there's a softer side to her. See them in Freaks and Geeks.

Susanna Kaysen is an aspiring writer, despairing young woman who struggles with suicidal thoughts. See them in Girl, Interrupted.

Can you be reckless and still be in control? Neil McCormick hopes so. See them in Mysterious Skin.

Pro tip: the psych ward is not the best place to find a mentor like Lisa Rowe. See them in Girl, Interrupted.