Because you like Gary the Snail in SpongeBob SquarePants

Whether it's a companion he’s failed or lingering guilt from the war, the Doctor can never truly let go of his past lives. See them in Doctor Who.

It's hard to tell if Dean Winchester cares more about saving the world or his 1967 Chevy Impala. See them in Supernatural.

Clary Fray's philosophy: dive into the supernatural underworld first and ask questions later. See them in City of Bones.

Aldous Snow is a rock star who plays hard and parties harder. See them in Get Him to the Greek.

Mike Lane is magnetic, beefy, and street-smart, but how long can he keep up with the red-light scene? See them in Magic Mike.

Stuck somewhere between life and death, Talion is motivated by one thing only: vengeance. See them in Middle-earth: Shadow of Mordor.

Titus Andromedon will show you the ropes, help you with your problems, and sing at you constantly, whether you like it or not. See them in Unbreakable Kimmy Schmidt.

When a half-breed breaks the rules, John Constantine deports them straight back to hell. He's trying to buy his way into heaven. See them in Constantine.

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.

Effortlessly sexy, calm, and collected, Eric Northman is equally at home ripping off heads and flirting with waitresses. See them in True Blood.

Manipulative, gorgeous, and sharp as a tack, Blair Waldorf is a classic product of the Upper East Side. See them in Gossip Girl.

A natural leader, Clarke Griffin dispenses both justice and mercy, and she does it all while being selflessly humble. See them in The 100.