Because you like Diddy Kong in Donkey Kong
Olive Hoover is an irrepressible child beauty queen (or would-be queen) who doesn't play by your rules. See them in Little Miss Sunshine.
Mother Gothel is a great mother as long as you never, ever, break the rules. See them in Tangled.
A powerful dragon-hunting warrior, Dovahkiin is destined for great things. See them in The Elder Scrolls V: Skyrim.
Jasmine dreams of something more than palace life, and she's not afraid to go get it. See them in Aladdin.
Sam Montgomery works hard, but her evil stepmother makes sure her efforts don't pay off. See them in A Cinderella Story.
Marv is a brutish but principled thug who'd be right at home on an ancient battlefield. See them in Sin City.
Polite and clever, Annie James is not afraid to stir up a little mischief. See them in The Parent Trap.
An aristocrat-turned-tomb-raider, Lara Croft does her best thinking while plunging off cliffs. See them in Lara Croft: Tomb Raider.
Raz is a 10-year-old boy who mostly stays in his own head, which makes sense since that's where he is strongest. See them in Psychonauts.
Did he ever tell you the definition of insanity? Just wait, and this psychopath will do just that. See them in Far Cry 3.
Matt Flamhaff is not too concerned about being part of the popular crowd. Too bad his best friend is. See them in 13 Going on 30 .