Because you like The Wicked Witch of the West in The Wizard of Oz
Meat Boy tenaciously throws himself into danger, and when he fails, he immediately gets back up and tries again. See them in Super Meat Boy.
Sarah Ashburn lives life by the book and has trouble getting along with anyone who doesn't do the same. See them in The Heat.
Django was once a slave. Now that he has a taste of freedom, he understandably wants a full meal. See them in Django Unchained.
Claire Underwood is scary intimidating, and she knows it. See them in House of Cards.
Good fashion? Check. Snarky quips? Check. Supernatural evil-fighting powers? Also check. See them in Buffy the Vampire Slayer.
A fourth grader without a moral compass, Eric Cartman lives on KFC, Taco Bell, Pizza Hut, and Cheesy Poofs. See them in South Park.
Tarzan is walking the line between human and animal. Good thing he has excellent balance. See them in Tarzan.
Regina George is teen royalty. And anything the queen bee says, goes. See them in Mean Girls.
A suave demon, Crowley grants humans their wishes in exchange for their soul, only to find loopholes that benefit him. See them in Supernatural.
Level-headed Ian Gallagher may be focused on his goals, but he's got a mischievous side too. See them in Shameless.
An opportunistic fugitive-turned-bounty-hunter, Faye Valentine uses both grit and her good looks to get ahead. See them in Cowboy Bebop.