Because you like Puck in A Midsummer Night's Dream

Aang is already a master airbender and once he learns to manipulate water, earth, and fire, he'll be truly unbeatable. See them in Avatar: The Last Airbender.

In love with a daughter of his family's sworn enemies, Romeo Montague must find a way to reconcile his conflicting desires. See them in Romeo & Juliet.

WALL-E is a quirky little romantic robot cleaning the wasteland known as Earth. See them in WALL-E.

A caring, curious, and considerate android, Vision could crush your skull if he had to. But he'd rather not. See them in Marvel Cinematic Universe.

The Terminator is an emotionless killing machine who won't stop until he's changed the future. See them in The Terminator.

Cooper says he used to look up at the sky and wonder at our place in the stars, but now he looks down and worry about our place in the dirt. See them in Interstellar.

An opportunistic fugitive-turned-bounty-hunter, Faye Valentine uses both grit and her good looks to get ahead. See them in Cowboy Bebop.

The self-described "ghost with the most" knows the ins-and-outs of specter life like no other. Just ask him. See them in Beetlejuice.

This metal-bending mutant may be misaligned with the genetically normal people of the world, but Magneto's got class for days. See them in X-Men Series.

Ciel Phantomhive is a haughty teenage nobleman who doesn't suffer fools gladly. See them in Black Butler.

Not only could Hellboy avenge your death, he'd also have a sense of humor about it and not let it ruin the rest of his night. See them in Hellboy.

Don't ask Rosa Diaz, a Brooklyn detective, to lighten up. Actually, to be safe, don't ask her to do anything! See them in Brooklyn Nine-Nine.