Because you like C. J. Cregg in The West Wing

Peter Venkman's "research" projects are designed to get undergraduate students to sleep with him. Though it turns out he can bust ghosts. See them in Ghostbusters.

Daniel LaRusso is a Jersey kid in L.A. who is learning about karate and life from the mysterious Mr. Miyagi. See them in The Karate Kid.

Khan Noonien Singh is super strong, super smart, and out for revenge. He always seems to be two steps ahead of his enemies. See them in Star Trek Into Darkness.

A good guy who's made some bad choices, Scott Lang is driven in his quest for redemption. See them in Marvel Cinematic Universe.

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.

A kind and funny valedictorian, Gwen Stacy likes to make out with Spider-man when her homework's done. See them in Marvel Cinematic Universe.

Poison Ivy is a seductive, venomous botanist laments the fact that there are so many people to kill, yet so little time. See them in DC Extended Universe.

April Ludgate doesn't like sunshine. She's more of a blood and guts kinda girl. See them in Parks and Recreation.

R2-D2 has been in the galaxy saving business for decades. Not bad for somebody whose vocabulary is limited to "beep-boop." See them in Star Wars Series.

Newt Scamander is more comfortable with animals than people, even if the animals are super-dangerous magical creatures. See them in Fantastic Beasts and Where To Find Them.

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.