Because you like Huck Finn in The Adventures of Huckleberry Finn
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.
Cinderella will sacrifice herself to keep her family's memory alive. See them in Cinderella (Live Action).
Khan Noonien Singh is super strong, super smart, and out for revenge. He always seems to be two steps ahead of his enemies. See them in Star Trek Into Darkness.
An underdog with nothing left to lose, Donnie Creed has everything to prove. See them in Creed.
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.
All the world's a stage, and Missy Piggy's never one to give up the spotlight. See them in The Muppet Movie.
Jamal Malik came from humble beginnings in an Indian slub filled with street gangs, but he is destined for bigger things. See them in Slumdog Millionaire.
When it comes to dancing and life, nobody puts Frances Houseman in the corner. See them in Dirty Dancing.
WALL-E is a quirky little romantic robot cleaning the wasteland known as Earth. See them in WALL-E.
Dante Alighieri is a crusader fighting his way to absolution. See them in Dante's Inferno.
Wei Shen is an undercover cop on a mission for justice (or at least vengeance). See them in Sleeping Dogs.