Because you like Dorian Gray in Dorian Gray
A crabby troll, Karkat Vantas is perpetually angry about his lot in life. See them in Homestuck.
Leatherface's moods change with his masks. See them in The Texas Chainsaw Massacre.
Emily Gilmore is the DAR chair, proud grandmother, and full of opinions. See them in Gilmore Girls.
Penelope Garcia is the smartest ex-con turned FBI tech, but her fashion never fails to raise eyebrows. See them in Criminal Minds.
Kenny McCormick is a boy of few words who likes nudie mags, NASCAR, monster trucks, origami, and Peruvian pan flute bands. See them in South Park.
Jeff Winger thinks he's too cool for school, which is a problem because he just enrolled in community college. See them in Community.
A former child mayor fallen from grace, Ben Wyatt is still trying to pick up the pieces years later. See them in Parks and Recreation.
Logan Huntzberger is a daredevil, romantic, and heir to a media empire. See them in Gilmore Girls.
Fun and feisty on the outside, Meredith Grey is dark and twisty on the inside. See them in Grey's Anatomy.
Though Twilight might be opposed to it, her new friends might just be able to teach this serious-minded pony how to relax. See them in My Little Pony.
Mitchell Pritchett prefers to have a place for everything and everything in its place. See them in Modern Family.
After having his mind altered after a bad breakup, Joel Barish is not convinced that ignorance is bliss. See them in Eternal Sunshine of the Spotless Mind.