Because you like Martha Jones in Doctor Who

Gloria Delgado-Pritchett's big personality is rivaled only by her big heart. Wait, did we mention she's gorgeous? See them in Modern Family.

Finn is the world's last human who's "all about" understanding right and wrong. See them in Adventure Time.

A hurricane of a human being, Marla Singer is destructive and unforgettable. See them in Fight Club.

John Wick is a widowed former Navy Seal who becomes a notoriously effective hitman, killing over 124 people with gunshots alone. See them in John Wick.

Mikasa Ackerman is a near-perfect soldier who won't break her stone-faced expression whether she's killing foes or protecting loved ones. See them in Attack on Titan.

They say money can't buy happiness, but this reckless, high-flying banker knows otherwise. See them in The Wolf of Wall Street.

Anyone who's said "Don't worry, it's just a dream" never met Freddy Krueger. See them in A Nightmare on Elm Street.

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.

A man of the court, Lord Varys knows how to manipulate it better than anyone. See them in Game of Thrones.

It's certainly easier to get great footage of crimes when you can guarantee they'll happen. See them in Nightcrawler.

While his twin tries to save lives, Millions Knives does the best to end them. See them in Trigun.

Liu Kang spends his days training his body and spirit, seeking to become the ultimate warrior. See them in Mortal Kombat.