Because you like Leonard "Bones" McCoy in Star Trek

Kesuke Miyagi is a karate expert who thinks the best way a scrawny high schooler can learn how to defend himself is by washing every surface in sight. See them in The Karate Kid.

The destroyer, Drax lives for one thing and one thing only: revenge. See them in Marvel Cinematic Universe.

Not only will Emmett Brown's time-saving gadgets help you travel with ease, his tinkering on your car will help you get wherever you need to go. Fast. See them in Back to the Future.

Beloved by all, Lucy is the most corageous Pevensie. See them in The Chronicles of Narnia.

Claudia may look young, but she is a wise and philosophical vampire, knowing of the world and the darker nature of man. See them in Interview with the Vampire: The Vampire Chronicles.

Sydney Bristow is a kick-ass double agent on a mission for revenge. See them in Alias.

King Schultz is about as color-blind as a man of his era can be. See them in Django Unchained.

A poised, stately man-out-of-time, Ichabod Crane typically faces the modern world with wry quip. See them in Sleepy Hollow.

It's easy to see why Poe Dameron would side with the rebellion: he's bad at taking orders, likes to show off, and is committed to the cause. See them in Star Wars Series.

Small in stature, Clara Oswald has a big appetite for adventure. See them in Doctor Who.

Success for Eggsy Unwin means joining Kingsman, and failure could mean death. See them in Kingsman: The Secret Service.

Ultron is security software turned evil mastermind. See them in Marvel Cinematic Universe.