Because you like Samwise Gamgee in The Lord of the Rings

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.

James Wilson is a compassionate doctor who willingly plays the sidekick. See them in House M.D..

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.

An opinionated pothead with a passion for conspiracy theories, Steven Hyde is secretly more sensitive than he lets on. See them in That '70s Show.

Evan is a sensible kid, but being sensible isn't going to help him lose his virginity. See them in Superbad.

Patrick Verona is a bad boy who's after a tough girl. See them in 10 Things I Hate About You.

Underneath his preening narcissist exterior, Schmidt is, well, still kind of a preening narcissist. But he has a good heart too. See them in New Girl.

Ash Williams is a houseware clerk at S-Mart and the Chosen One. See them in The Evil Dead.

Donna Pinciotti is strong, independent, and empathetic. No one messes with her. See them in That '70s Show.

Riley Blue is trying to outrun her bad luck, but she might not be fast enough. See them in Sense8.

Michaelangelo is an above-ground crime-fighter by night, and a pizza-eating, sewer-dwelling mutant ninja turtle by day. See them in Teenage Mutant Ninja Turtles.

A short-tempered guy, Bowser is determined to wreak havoc on the Mushroom Kingdom. See them in Super Mario Bros..