Because you like Michael Kelso in That '70s Show

When the going gets tough, Rick Grimes gets tougher. It's a very useful trait when the world goes to hell. See them in The Walking Dead.

If Lisbeth Salander can hurt a bastard who deserves it by digging up stuff about him, she feels good. See them in The Girl with the Dragon Tattoo.

A daring hacker, Trinity is one of the few rebels who escaped the Matrix, a simulation in which most of humanity is enslaved. See them in The Matrix.

Phil Coulson is a deadly field agent with the demeanor of a friendly dad. See them in Marvel Cinematic Universe.

Regina Mills is a cold evil queen turned chilly town mayor. See them in Once Upon a Time.

He's an eccentric pirate making it up as he goes along. He's Jack Sparrow, savvy? See them in Pirates of the Caribbean: the Curse of the Black Pearl.

Cynicism is his armor and words are his weapons, but what Tyrion Lannister would really like is some nice wine. See them in Game of Thrones.

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

Francis Freeman may be impervious to pain, but he sure knows how to inflict it. See them in Deadpool.

Melinda May is a woman of few words and many talents. Most of them martial. See them in Marvel Cinematic Universe.

Artemis Fowl understands the way of the world. If he wins, he's a prodigy. If he loses, then he's crazy. That is how history is written. See them in Artemis Fowl.