Because you like Optimus Prime in Transformers
Harrison Wells is a brilliant scientist full of secrets. See them in DC Extended Universe.
Stewie Griffin is just your average evil-genius, talking, sociopathic baby. See them in Family Guy.
Seth is short-tempered, crude, and terrible at school, but hopefully there's nothing an epic party can't fix. See them in Superbad.
Albus Dumbledore oversees the most unsafe school in recorded history, with Dementors and giant arachnids run amok. See them in Harry Potter Series.
Jack Frost would rather crack a joke or throw a snowball than take anything seriously. See them in Rise of the Guardians.
Impassive, overly literal, and a little short on people skills, Angel dedicates her life to enforcing the rules. See them in Angel Beats!.
Shrek is a nasty-on-the-surface ogre with a heart of gold and an earful of wax. See them in Shrek.
Maka is determined to collect and purify 99 Kishin eggs– human souls that have been corrupted by evil– and one witch soul. See them in Soul Eater.
Aslan represents everything good and just, he's just not super reliable. See them in The Chronicles of Narnia.
Cosmo Kramer is an eccentric schemer whom you might know better as the "Assman." See them in Seinfeld.
Arthur Dent is an incredibly normal man on an incredibly abnormal adventure. See them in The Hitchhiker's Guide to the Galaxy.