Because you like Jim Stark in Rebel Without A Cause
Mikey Waters would rather sell his body than rob anybody. See them in My Own Private Idaho.
Kara "Starbuck" Thrace will beat you in cards, drink you under the table, then fly circles around you in her fighter plane. See them in Battlestar Galactica.
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.
Christine Daae has been secretely taking lessons from a phantom musician. It sounded less creepy in her head. See them in The Phantom of the Opera.
Wei Shen is an undercover cop on a mission for justice (or at least vengeance). See them in Sleeping Dogs.
Marty McFly is a skateboarder, aspiring rock star, and reluctant time-traveler. See them in Back to the Future.
Elaine Benes is a tough New Yorker who can hang with the guys, and date the ones who are "sponge-worthy." See them in Seinfeld.
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.
When the going gets tough, Dre Johnson gets tougher. Well, he'd like to think he does. See them in Blackish.