Because you like Holden Caulfield in The Catcher in the Rye
Clementine Kruczynski thinks that too many guys think she's a concept, or she completes them, or she's gonna make them alive. See them in Eternal Sunshine of the Spotless Mind.
Just call Jeff Lebowski The Dude. Or His Dudeness, Duder, or El Duderino if you're not into that whole brevity thing. See them in The Big Lebowski.
Lyra Belacqua is prone to getting in trouble, but she's also clever enough to get out of it. Most of the time. See them in The Golden Compass.
If anyone can speak truth to power, it's Atticus Finch. With elequent monologues, he forces everyone to face hard truths. See them in To Kill a Mockingbird.
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.
Robbie Turner has been accused of a crime he never committed, changing the course of his life forever. See them in Atonement.
Frank Ginsberg is the number one Proust scholar in the world, but he recently failed at committing suicide. See them in Little Miss Sunshine.
Terence Fletcher is a brutal and unflinchingly strict music teacher hell-bent on whipping his students into shape. See them in Whiplash.
Riley Blue is trying to outrun her bad luck, but she might not be fast enough. See them in Sense8.
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.