Because you like Dorian Gray in Dorian Gray
Cosmo Kramer is an eccentric schemer whom you might know better as the "Assman." See them in Seinfeld.
Leonard "Bones" McCoy is passionate, moral, and ready to stitch you back together. See them in Star Trek.
WALL-E is a quirky little romantic robot cleaning the wasteland known as Earth. See them in WALL-E.
Regina George is teen royalty. And anything the queen bee says, goes. See them in Mean Girls.
Mrs. Lovett is the proud purveyor of the worst, and most grisly, pies in London. See them in Sweeney Todd: The Demon Barber of Fleet Street.
A hurricane of a human being, Marla Singer is destructive and unforgettable. See them in Fight Club.
Although Theon Greyjoy is treated well, he's still essentially a hostage. And that isn't so easy for him to forgive. See them in Game of Thrones.
Usagi Tsukino may look like a lazy teen, but when Usagi conjures up her alter ego and calls her Sailor Scout team, no villain stands a chance. See them in Sailor Moon.
Seth is short-tempered, crude, and terrible at school, but hopefully there's nothing an epic party can't fix. See them in Superbad.
Josh Lucas just can't stop hanging around his stepsister's house. See them in Clueless.
Yoda is wise, patient, and capable of kicking ass. He's done his best to mentor young Jedi and protect the balance of Light and Dark. See them in Star Wars Series.
Cisco Ramon is a proud, enthusiastic member of a superhero support team. See them in DC Extended Universe.