Because you like The Man in Black in The Princess Bride
Fiery and adventurous, Amy Pond is the sort of woman you'd want by your side on a journey through time and space. See them in Doctor Who.
Derek Morgan is thoughtful and kind, but he won't say no to knocking the occasional door down when he gets the chance. See them in Criminal Minds.
Michaelangelo is an above-ground crime-fighter by night, and a pizza-eating, sewer-dwelling mutant ninja turtle by day. See them in Teenage Mutant Ninja Turtles.
Anger is a cantankerous hothead whose job is to get others riled up. See them in Inside Out.
Egon Spengler prefers collecting spores, molds, and fungus to interacting with people. See them in Ghostbusters.
Kilgrave is a domineering, abusive boyfriend. Then, add in the power of mind control. See them in Marvel Cinematic Universe.
There's more to this sweet, caring landlady than meets the eye. See them in Sherlock.
Bumbling, jolly, and loyal, Rubeus Hagrid has the uncanny ability to make the best of a bad situation. See them in Harry Potter Series.
Catwoman might be slightly unhinged, but you can't say this feline villainess isn't confident. See them in DC Extended Universe.
A sarcastic and nosy tomboy, Stephanie Tanner is understandably not crazy about being the middle child. See them in Full House.