Because you like Ellen Ripley in Alien

Randy Marsh is a geologist and Nobel Prize winner who is into binge drinking, starting riots, the Food Network, and P.F. Changs. See them in South Park.

As high-strung as she is talented, Rachel Berry both marches and sings to the beat of her own drum. See them in Glee.

Josh Lucas just can't stop hanging around his stepsister's house. See them in Clueless.

Spencer Reid's super-smarts helps catch killers, and his social awkwardness endears co-workers. See them in Criminal Minds.

Back in his hometown, Richie Tozier has been punched, dragged to a crackhouse and now has to kill a clown. See them in It.

A bloodsucker, Carlisle Cullen is actually more likely to give you a blood infusion. See them in Twilight.

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.

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

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

Alex Russo desperately wants to keep her magic – after all, things are so much easier when you can just wave a wand. See them in Wizards of Waverly Place.

Michael Moscovitz is a high school student of few words but a lot of heart. See them in The Princess Diaries.