Because you like The Wicked Witch of the West in The Wizard of Oz

A reformed former outlaw, John Marston doesn't want any trouble, yet somehow trouble always seems to find him. See them in Red Dead Redemption.

Walter White's knowledge of chemistry allows him to cook astoundingly pure meth, leading to a rapid – albeit tumultuous – rise in the criminal drug world. See them in Breaking Bad.

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

If you hang out with Bender in cool dive bars in 31st century New York, make sure you're on his "Do Not Kill" list. See them in Futurama.

Marty McFly is a skateboarder, aspiring rock star, and reluctant time-traveler. See them in Back to the Future.

Korra is stubborn, outgoing, and faced with huge responsibilities she might not be ready for. See them in The Legend of Korra.

Dory is more than a little forgetful, but she'll always remember to have your back. See them in Finding Nemo.

A nurturing, selfless, and level-headed leader, Makoto Tachibana loves looking out for his friends. See them in Free! Iwatobi Swim Club.

A girl who grew up on stories, Meggie Folchart is as loyal and intrepid as one of her fictional heroines. See them in Inkheart.

Tiffany Doggett is usually a nice, good Christian. Just don't get her riled up! See them in Orange Is The New Black.

A gruff and hardened professional, Marcus Fenix keeps his emotions buried deep. See them in Gears of War.

Detective Alec Hardy doesn't let anyone get too close to him. See them in Broadchurch.