Because you like Principal Skinner in The Simpsons
Ultron is security software turned evil mastermind. See them in Marvel Cinematic Universe.
Mac is a karate-chopping, beer-chugging schemer. See them in It's Always Sunny in Philadelphia .
The Ice King is lonely and looking for a princess to sweep him off his feet. See them in Adventure Time.
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.
Sydney Bristow is a kick-ass double agent on a mission for revenge. See them in Alias.
Samwell Tarly is a scholar, not a fighter. But that's not good for an aspiring member of the Night's Watch. See them in Game of Thrones.
Once a handsome prince, the Beast is now a grumpy, furry, monster. It's hard to pinpoint which mammal he resembles the most. See them in Beauty and the Beast.
Merciless and manipulative, Queen Ravenna is determined to become the fairest of them all. See them in Snow White and the Huntsman.
Kilgrave is a domineering, abusive boyfriend. Then, add in the power of mind control. See them in Marvel Cinematic Universe.
With each reboot, Janet progresses more and becomes capable of human emotions. See them in The Good Place.