Because you like Korben Dallas in The Fifth Element
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.
After surviving a CIA mission that was supposed to kill him, ex-military man John Reese bets it all on a chance to redeem himself. See them in Person of Interest.
A compassionate medical student, Martha Jones has found a Doctor she can really look up to. See them in Doctor Who.
A champion of chivalry, Don Quixote is dutifully bringing good to the world—even when others think he's out of his mind. See them in Don Quixote.
A suave proprietor of an upscale nightclub and gambling den, Rick Blaine is dealing with World War II and a broken heart. See them in Casablanca.
Innately shy, Ginny Weasley is growing into a feisty, independent spirit. See them in Harry Potter Series.
People make more sense to the hyper-logical Temperance Brennan after they're dead. See them in Bones.
Jasmine dreams of something more than palace life, and she's not afraid to go get it. See them in Aladdin.
Give in to the dark side with vampire Lestat; it's more fun. See them in Interview with the Vampire: The Vampire Chronicles.
Egon Spengler prefers collecting spores, molds, and fungus to interacting with people. See them in Ghostbusters.
Point the fun-loving Pippin Took towards second breakfast, and he's one happy hobbit. See them in The Lord of the Rings.