Because you like Raj Koothrappali in The Big Bang Theory
You won't like him when Bruce Banner is angry. See them in Marvel Cinematic Universe.
One of the best in the magical world, Mad-Eye has the battle scars to prove his dedication to such a dangerous job. See them in Harry Potter Series.
Moe Szyslak is the crabby owner of the grimiest bar in Springfield. See them in The Simpsons.
Egon Spengler prefers collecting spores, molds, and fungus to interacting with people. See them in Ghostbusters.
The biggest nerd in high school, Bill Haverchuck is the biggest target for bullies. See them in Freaks and Geeks.
Dolores Umbridge keeps her villainy hidden (albeit poorly) behind a sheen of sugary pink politeness. See them in Harry Potter Series.
The Genie is the perfect buddy, granting every wish we might have and keeping life good-spirited. See them in Aladdin.
Jorah Mormont is loyal to his queen. And he's quite in love with her as well. See them in Game of Thrones.
Despite Norman Bates' typically kind and shy personality, he is also prone to occasional violent outbursts. See them in Bates Motel.
A formerly righteous wizard, Saruman has been corrupted by the forces of evil. See them in The Lord of the Rings.