Because you like Butthead in Beavis and Butthead
As a doctor-in-training, John Dorian should have his head in the game. But most of the time, it's in the clouds. See them in Scrubs.
Bob Belcher runs a lonely burger joint, and even though his wit is lost on his eccentric family, he doesn't let that faze him. See them in Bob's Burgers.
Roger is a pansexual alcoholic non-human who will happily lie, cheat and steal to get what he wants. See them in American Dad!.
Donna Pinciotti is strong, independent, and empathetic. No one messes with her. See them in That '70s Show.
Kim Kelly is a high school bully who's normally in a bad mood. But there's a softer side to her. See them in Freaks and Geeks.
Dallas Winston is headed down a dangerous, criminal road. See them in The Outsiders.
Olive Hoover is an irrepressible child beauty queen (or would-be queen) who doesn't play by your rules. See them in Little Miss Sunshine.
Marv is a brutish but principled thug who'd be right at home on an ancient battlefield. See them in Sin City.
Tail's smarts and helpful nature come in handy in a pinch. See them in Sonic the Hedgehog.