Because you like Beavis in Beavis and Butthead
Claire Standish is a popular, perfect princess who's deeper than she seems. See them in The Breakfast Club.
Carolos has perfect hair, a lab coat, and a constant readiness to do science. See them in Welcome to Night Vale.
Milo Thatch is an enthusiastic researcher without cynicism. See them in Atlantis: The Lost Empire.
The self-described "ghost with the most" knows the ins-and-outs of specter life like no other. Just ask him. See them in Beetlejuice.
Cynical, judgmental, and hipper-than-thou, Enid Coleslaw wears her outsider status like a badge of honor. See them in Ghost World.
Greg Heffley will be famous someday, but now he's stuck in class with morons. See them in Diary of a Wimpy Kid.
Danny Zuko's car is auto-matic. Its system-matic. Its hyyyyydro-matic. Why, its greased lightning! See them in Grease.
From secret organizations to alien attacks, Kyon's life has been one weird, unexplainable thing happening after another. See them in The Melancholy of Haruhi Suzumiya.
Cady Heron is the new girl in town who's also new to the world of high school, period. See them in Mean Girls.
It turns out Dracula's son Alucard has some pretty severe daddy issues. See them in Castlevania.