Because you like Joan Holloway in Mad Men

A laid-back stoner, Ben Stone wasn't planning on life's ultimate responsibility. See them in Knocked Up.

Underneath her brassy, sarcastic exterior, Olive Penderghast is more sensitive than she pretends to be. See them in Easy A.

Jesse Tuck dreams of finding someone to join his unusual family. See them in Tuck Everlasting.

A Silurian lizard woman, Madame Vastra has a penchant for puzzles and interspecies romance. See them in Doctor Who.

Burton Guster is a level-headed investigator with a "Super Sniffer" nose. See them in Psych.

Artemis Fowl understands the way of the world. If he wins, he's a prodigy. If he loses, then he's crazy. That is how history is written. See them in Artemis Fowl.

It’s usually the good-looking, charismatic, play-by-their-own-rules types that get everyone into trouble, and Tyler Durden is Exhibit A. See them in Fight Club.

Smart but insecure, Tally Youngblood is torn between what she wants and what her society demands. See them in Uglies.

Be careful around Marie Laveau. There's no one more vengeful than a double-crossed voodoo queen. See them in American Horror Story.

John Bender's interests include marijuana, fighting, and breaking the rules. See them in The Breakfast Club.

While Alan Garner is loyal to his new friends, his efforts to help them often do more harm than good. See them in The Hangover.

World domination and Superman's demise are next on Lex Luthor's to-do list. See them in DC Extended Universe.