Because you like Catcher Block in Down with Love

Gollum is slimy and seething with hatred, the last person you would want to meet in a dark cave. See them in The Lord of the Rings.

Captain Spock is on a five-year mission exploring the final frontier and boldly going where no man has gone before. See them in Star Trek.

With his own ship, Peter Quill calls his own shots, and gets to fly from planet to planet blasting '70s pop hits and picking up alien chicks. See them in Marvel Cinematic Universe.

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

Alison DiLaurentis believes you're always better off with a really good lie. See them in Pretty Little Liars.

Brilliant, violent, and only a little insane, the Joker doesn't listen to anyone except the voices in his head. See them in DC Extended Universe.

Margo loves mysteries so much that she becomes one. See them in Paper Towns.

Dory is more than a little forgetful, but she'll always remember to have your back. See them in Finding Nemo.

Sandy Olsen is out of her head, hopelessly devoted to Danny. See them in Grease.

Although Jareth seems like he's just a harmless romantic, his powers make him a formidable foe. See them in Labyrinth.

He's an eccentric pirate making it up as he goes along. He's Jack Sparrow, savvy? See them in Pirates of the Caribbean: the Curse of the Black Pearl.

John Watson is haunted by his past (who isn't) but he's starting to branch out with some help from a world class detective. See them in Sherlock.