Because you like Willie T. Strokes in Bad Santa
A cursed pirate captain, Barbossa is greedy, vengeful, and surprisingly cheeky. See them in Pirates of the Caribbean: the Curse of the Black Pearl.
Count Olaf is a traveling actor, except he can't act and his homicidal tendencies make finding work pretty difficult. See them in Lemony Snicket's A Series of Unfortunate Events.
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.
Boomerang is equally skilled at tossing boomerangs and tossing back beers. See them in DC Extended Universe.
Sideshow Bob is a bitter ex-performer who was forced to do inhumane stunts for slapstick comedy. Now he's exacting revenge on his former boss, a clown. See them in The Simpsons.
Mr. Fox will never truly be happy without a dead chicken between his chompers. See them in Fantastic Mr. Fox.
Kumar Patel is always high, always hungry for sliders. See them in Harold & Kumar Go To White Castle.
Though he may be blind, Chirrut Imwe sees the power of the force more than most. See them in Rogue One.
Vincent Vega likes a good steak, a cheap milkshake, and killing a target without anything going wrong. See them in Pulp Fiction.
Waylon Smithers would do anything for his boss, and would love to do a few things *to* him. See them in The Simpsons.
Jeff Winger thinks he's too cool for school, which is a problem because he just enrolled in community college. See them in Community.
Hoban Washburne shows you can be a hotshot space pilot *and* play with dinosaurs. See them in Firefly.