Because you like Sean Maguire in Good Will Hunting
Evan is a sensible kid, but being sensible isn't going to help him lose his virginity. See them in Superbad.
Beware! Anton Chigurh carries a coin with him, which he forces his victims to flip to decide whether they will live or die. See them in No Country for Old Men.
Manipulative, conniving, and ruthless, Mr. Gold is enigmatic no matter what world he's in. See them in Once Upon a Time.
Bobby Singer is a redneck ghost hunter, but all he wants to do is retire to the junk yards of South Dakota. See them in Supernatural.
Holly Golightly spends so much time trying to be other people's dream girl, she doesn't really know what kind of girl she actually is. See them in Breakfast at Tiffany's.
Felicity Smoak is a brilliant hacker who nonetheless becomes tongue-tied in front of attractive men. See them in DC Extended Universe.
Jax Teller can be cool or vengeful, calm or wrathful, depending on the situation. See them in Sons of Anarchy.
The biggest nerd in high school, Bill Haverchuck is the biggest target for bullies. See them in Freaks and Geeks.
Philip J. Fry accidentally cryogenically froze himself for a millennium. See them in Futurama.
Rebecca Bunch struggles with decision making. So much so that she chases her high school boyfriend across the country to win him back. See them in Crazy Ex-Girlfriend.
It's time somebody has to take over. It might as well be Fish Mooney. See them in Gotham.