Because you like Bellatrix Lestrange in Harry Potter Series
Jessica Rabbit isn't bad. She's just drawn that way. See them in Who Framed Roger Rabbit.
Boomerang is equally skilled at tossing boomerangs and tossing back beers. See them in DC Extended Universe.
A cursed pirate captain, Barbossa is greedy, vengeful, and surprisingly cheeky. See them in Pirates of the Caribbean: the Curse of the Black Pearl.
Haymitch Abernathy is a trainer for the tributes of District 12, although he's never sober enough to give much advice. See them in The Hunger Games .
Emma Frost's superpower: transforming her body into an unbreakable diamond. See them in X-Men Series.
Darcy Lewis is a razor-sharp scientist studying things that science can't explain. See them in Thor.
For Wreck It Ralph, it's not easy being the bad guy. Especially when you've been designed to destroy but really desire love. See them in Wreck-It Ralph.
Rogue's touch is literally deadly, and she's trying to learn from the older mutants how to manager her powers. See them in X-Men Series.
Born and raised in the darkness, Bane is determined to have the city totally under his control so that he can demolish it. See them in DC Extended Universe.