Because you like Sally Albright in When Harry Met Sally...
Resourceful and pragmatic, Selina Kyle always keeps in mind her number one priority: herself. See them in Gotham.
Steve Stifler is more than just a dude with a hot mom. He's also rude, profane, and obnoxious. See them in American Pie.
A good-natured and academically minded superhero, Dan Dreiberg can still get his hands dirty in a fight. See them in Watchmen.
Red doesn't like to explain herself. She wants her work to do the talking. See them in Transistor.
After figuring out how both the light and dark halves of his soul could co-exist, Jak is maturing into a real hero. See them in Jak and Daxter.
Alex Vause's tattoos and tough exterior cover the fact that she's just a girl with a really intense crush. See them in Orange Is The New Black.
Artemis Fowl understands the way of the world. If he wins, he's a prodigy. If he loses, then he's crazy. That is how history is written. See them in Artemis Fowl.
Gruff and sarcastic, Detective Harry Dresden use unconventional ways to track down perps, including using magic and the supernatural. See them in The Dresden Files.
Playing his cards close to his vest, J. Daniel Atlas believes the closer you look, the less you see. See them in Now You See Me.
John Locke is an eerily calm, confident believer in the magic of the island that gave him his legs back. See them in Lost.
V is a violent anarchist with literally nothing left to lose. But, he might have a point. See them in V for Vendetta.