Because you like Elaine Benes in Seinfeld
Juliet Starling is a cheerleader by day, gleefully unhinged zombie killer by night. See them in Lollipop Chainsaw.
Dr. Gordon Freeman is a brilliant physicist is a quiet hero. And given all the violent aliens, he better be. See them in Half-Life.
Philip J. Fry accidentally cryogenically froze himself for a millennium. See them in Futurama.
You don't teach a class called "How To Get Away With Murder" without knowing a thing or two about getting away with things. See them in How to Get Away with Murder.
Josh Lucas just can't stop hanging around his stepsister's house. See them in Clueless.
Robin Scherbatsky is a former teen pop star who loves dogs and is scared of relationships. See them in How I Met Your Mother.
Xena's a warrior on a redemptive quest who excels in extreme sports and uses a whip to block axes in mid-air. See them in Xena Warrior Princess.
Indiana Jones is a swashbuckling archeologist who hates snakes, Nazis, and priceless artifacts falling into the wrong hands. See them in Raiders of the Lost Ark.
If the awesome Andie Walsh is from the wrong side of the tracks, we don't want to be right. See them in Pretty in Pink.
Leonard "Bones" McCoy is passionate, moral, and ready to stitch you back together. See them in Star Trek.
Bodhi Rook is a defected pilot for the Galactic Empire dead set on destroying the Death Star. See them in Rogue One.