Because you like Squidward Tentacles in SpongeBob SquarePants
This barber doesn't cut hair. Sweeney Todd sends his clients down a chute to be baked into his partner-in-crime's pies. See them in Sweeney Todd: The Demon Barber of Fleet Street.
John Wick is a widowed former Navy Seal who becomes a notoriously effective hitman, killing over 124 people with gunshots alone. See them in John Wick.
A life spent as "Number Two" is bound to give Diego Hargreeves an inferiority complex. See them in The Umbrella Academy.
In constant agony, Ava Starr will do anything to give up the superpowers that are slowly killing her. See them in Marvel Cinematic Universe.
Emma Frost's superpower: transforming her body into an unbreakable diamond. See them in X-Men Series.
Let's just say Sheldon Oberon is having an out-of-body experience like no other. See them in Jumanji.
Caleb Rivers is a bad boy with a good reason for acting out. See them in Pretty Little Liars.
Edmund Pevensie isn't a bad person, but he did sell his siblings out for a tin of Turkish Delight. See them in The Chronicles of Narnia.
Ethical but anxious, Chidi Anagonye approaches life like a problem to be solved. See them in The Good Place.
Talos is a mysterious military commander skilled in the art of deception. See them in Marvel Cinematic Universe.
Charles Boyle is the human equivalent of a puppy, only slightly less adorable. See them in Brooklyn Nine-Nine.