Because you like Leonard Hofstadter in The Big Bang Theory

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

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.

For Louie C.K., comedy is tough but fatherhood is even tougher. See them in Louie.

After becoming accepted into the group of popular girls, Tracy Freeland has turned from a sweet and reserved teenager into a monster. See them in thirteen.

Will Herondale is an emotionally distant bad boy with a secret. See them in Clockwork Angel .

A rebellious blue-haired art student, Karou has mysterious connections to a magical world. See them in Daughter of Smoke and Bone .

Dimitri Belikov is a stoic vampire guardian who has the reserve, focus, and discipline of a soldier. See them in Vampire Academy .