Because you like Vegeta in Dragon Ball Z

Waylon Smithers would do anything for his boss, and would love to do a few things *to* him. See them in The Simpsons.

Scooby-Doo always keeps his priorities in order: eat snacks first, solve mysteries later. See them in Scooby-Doo.

Khan Noonien Singh is super strong, super smart, and out for revenge. He always seems to be two steps ahead of his enemies. See them in Star Trek Into Darkness.

Everyone Barney Stinson knows is getting married or pregnant. But he's just getting more awesome. See them in How I Met Your Mother.

R2-D2 has been in the galaxy saving business for decades. Not bad for somebody whose vocabulary is limited to "beep-boop." See them in Star Wars Series.

Spyro the Dragon loves getting into trouble around the Dragon Realms. See them in Spyro the Dragon.

Peter Pan is a boy who never grew up. See them in Peter Pan.

It's certainly easier to get great footage of crimes when you can guarantee they'll happen. See them in Nightcrawler.

Severus Snape is a misanthropic potions teacher with a vindictive streak. See them in Harry Potter Series.

A devoted butler, Alfred Pennyworth is both a fiercely protective guardian and a lethal gunman. See them in Gotham.

Like her trusty sword, Arya Stark is tiny but vicious. See them in Game of Thrones.

When Jessica Jones is not throwing back drinks, she's taking down bad guys with her strength, detective skills, and foul-mouthed insults. See them in Marvel Cinematic Universe.