Because you like Niles Crane in Frasier
Brilliant, violent, and only a little insane, the Joker doesn't listen to anyone except the voices in his head. See them in DC Extended Universe.
Belle has ready every storybook in town, and she's slowly realizing that life is no fairytale. See them in Beauty and the Beast.
Make sure not to anger the Hulk or else he will transform into a giant green monstrosity and smash anything in his way. See them in Marvel Cinematic Universe.
America Singer is a feisty, fiercely independent musician who places little value on the restrictive rules of her society. See them in The Selection .
Underneath her brassy, sarcastic exterior, Olive Penderghast is more sensitive than she pretends to be. See them in Easy A.
His superiority complex coupled with his bitter desire for revenge makes Vegeta a formidable foe. See them in Dragon Ball Z.
A crabby troll, Karkat Vantas is perpetually angry about his lot in life. See them in Homestuck.
Don't underestimate Maggie Greene. She's a farm girl with a mission. See them in The Walking Dead.
The Terminator is an emotionless killing machine who won't stop until he's changed the future. See them in The Terminator.
Always headed towards adventure, Goku is frequently with a band of loyal companions at his side. See them in Dragon Ball.
Irene Adler has to use both her brains and her body to survive. Luckily, she's usually the most brilliant person in the room. See them in Sherlock.