Because you like Mark Sloan in Grey's Anatomy

Usagi Tsukino may look like a lazy teen, but when Usagi conjures up her alter ego and calls her Sailor Scout team, no villain stands a chance. See them in Sailor Moon.

Tracy Turnblad's got rhythm, and she's determined to share her dance moves with the world. See them in Hairspray.

He's a troubled insomniac in search of a moment to rest and a meaning to his existence. See them in Fight Club.

Poison Ivy is a seductive, venomous botanist laments the fact that there are so many people to kill, yet so little time. See them in DC Extended Universe.

Holden Caulfield is convinced that the whole adult world is full of phonies. See them in The Catcher in the Rye.

Just because Dracula wants to suck your blood doesn't mean he's not a gentleman. See them in Dracula.

For Scout Finch, growing up means learning the world is a more complicated place than you once thought. See them in To Kill a Mockingbird.

Oliver Tate is extremely articulate but hopelessly awkward. That's not a recipe for teenage happiness. See them in Submarine.

An escaped convict on a mission, Sirius Black is brooding, brave, and reckless. See them in Harry Potter Series.

Nothing instills more fear in the Empire than the deep kshhh of Darth Vader breathing through his helmet. See them in Star Wars Series.

Finn is the world's last human who's "all about" understanding right and wrong. See them in Adventure Time.

It doesn't matter how noble or brave he is. Jon Snow is a bastard, and people don't let him forget it. See them in Game of Thrones.