Because you like Vizzini in The Princess Bride
Marie Antoinette may be a fun-loving queen who has it all, but her husband doesn't know how to have sex, and an angry mob wants to cut off her head. See them in Marie Antoinette.
People make more sense to the hyper-logical Temperance Brennan after they're dead. See them in Bones.
A bumbling hobbit, Bilbo Baggins is becoming a part of something much larger than himself as he embarks on a quest. See them in The Hobbit: An Unexpected Journey.
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.
Basil Hallward is dominated, soul, brain, and power by Dorian. See them in Dorian Gray.
Lois Lane's journalistic success is the result of her tenacity. She will doggedly pursue her leads until discovering the information she needs. See them in DC Extended Universe.
All the world's a stage, and Missy Piggy's never one to give up the spotlight. See them in The Muppet Movie.
The crown prince of the Fire Nation, Zuko has been ordered by his father to find the long-lost Avatar before he is allowed to return home. See them in Avatar: The Last Airbender.
A kind, sensitive medical intern doing the best he can, George O'Malley sometimes struggles to keep up. See them in Grey's Anatomy.
Kyle Broflovski is an motional fourth-grader who plays Guitar Hero, speaks Pig Latin, and fights with his "Fat Ass" friend Cartman. See them in South Park.
Kenny McCormick is a boy of few words who likes nudie mags, NASCAR, monster trucks, origami, and Peruvian pan flute bands. See them in South Park.
Alex DeLarge likes his favorite milk-based, drug-laced cocktail. It helps him get in the mood for a night of "ultra violence." See them in A Clockwork Orange.