Because you like Seth Brundle in The Fly
Sarah Kerrigan is pretty much the Queen Bitch of the Universe. See them in StarCraft .
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.
A born psychopath, don't expect Michael Myers to understand the difference between right and wrong. See them in Halloween.
Dee Reynolds is selfish, narcissistic, and a target of extremely cruel ridicule. See them in It's Always Sunny in Philadelphia .
Mac is a karate-chopping, beer-chugging schemer. See them in It's Always Sunny in Philadelphia .
In Dennis Reynolds' mind, only a psycho wouldn't have a six-part system to bring home women. And he should know. See them in It's Always Sunny in Philadelphia .
Sideshow Bob is a bitter ex-performer who was forced to do inhumane stunts for slapstick comedy. Now he's exacting revenge on his former boss, a clown. See them in The Simpsons.
Kumar Patel is always high, always hungry for sliders. See them in Harold & Kumar Go To White Castle.
Just call Jeff Lebowski The Dude. Or His Dudeness, Duder, or El Duderino if you're not into that whole brevity thing. See them in The Big Lebowski.