Because you like Leonard "Bones" McCoy in Star Trek

Wei Shen is an undercover cop on a mission for justice (or at least vengeance). See them in Sleeping Dogs.

Foul mouthed and disturbingly comfortable with violence, Hit-Girl is a precocious assassin who doesn't need anyone's protection. See them in Kick-Ass.

Mikey Waters would rather sell his body than rob anybody. See them in My Own Private Idaho.

Hiro is a free-spirit and remarkable genius who loves bot fighting and problem-solving. See them in Big Hero 6.

Tarzan is walking the line between human and animal. Good thing he has excellent balance. See them in Tarzan.

Park feels like an outsider everywhere he goes, but he doesn't know if he wants to try fitting in anymore. See them in Eleanor and Park .

Alex DeLarge likes his favorite milk-based, drug-laced cocktail. It helps him get in the mood for a night of "ultra violence." See them in A Clockwork Orange.

Hayley Stark is a sarcastic 14-year-old with an unusual passion. See them in Hard Candy.

With his own ship, Peter Quill calls his own shots, and gets to fly from planet to planet blasting '70s pop hits and picking up alien chicks. See them in Marvel Cinematic Universe.

Bella Swan thinks of it as her job to help her parents and protect her friends, even though it often ends up the other way around. See them in Twilight.

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

Lily Aldrin is a flaky but supportive kindergarten teacher and painter. See them in How I Met Your Mother.