Because you like Leatherface in The Texas Chainsaw Massacre
Django was once a slave. Now that he has a taste of freedom, he understandably wants a full meal. See them in Django Unchained.
Detective Alec Hardy doesn't let anyone get too close to him. See them in Broadchurch.
Hanna Marin is a determined girl defined by her ability to transform herself. See them in Pretty Little Liars.
Christian Grey is just as controlling in the bedroom as the boardroom. See them in Fifty Shades of Grey.
Optimus Prime is a shapeshifting sentient robot leading a team of robots to stop evil from taking over. See them in Transformers.
For now Lindsay Weir is a geek, but who knows? Maybe she fits in better with the freaks. See them in Freaks and Geeks.
Kathryn Merteuil may be a vain sociopath, but you won't be able to look away. See them in Cruel Intentions.
Though cynical about the world, Shuya Nanahara is caring and protective towards his friends. See them in Battle Royale.
Moving is hard for Coraline Jones; accidentally moving to a creepy mirror world just makes it harder. See them in Coraline.
Although Mako Mori may be small and quiet, she is a core of battle-hardened steel. See them in Pacific Rim.
Stewie Griffin is just your average evil-genius, talking, sociopathic baby. See them in Family Guy.
For the sake of science, Kurisu Makise will persevere no matter how deep into the dark secrets of the world she finds herself. See them in Steins;Gate.