Because you like The Creature in Frankenstein
In constant agony, Ava Starr will do anything to give up the superpowers that are slowly killing her. See them in Marvel Cinematic Universe.
Mother Gothel is a great mother as long as you never, ever, break the rules. See them in Tangled.
Whether it's a fire or a pit of lions, there's almost no predicament that Violet Baudelaire can't get her and her siblings out of. See them in Lemony Snicket's A Series of Unfortunate Events.
After having his mind altered after a bad breakup, Joel Barish is not convinced that ignorance is bliss. See them in Eternal Sunshine of the Spotless Mind.
People make more sense to the hyper-logical Temperance Brennan after they're dead. See them in Bones.
Jasmine dreams of something more than palace life, and she's not afraid to go get it. See them in Aladdin.
Handsome Jack is wearing a mask of his own face to hide his scarred real one. See them in Borderlands Series.
Reckless, vulgar, loud-mouthed: that's what makes Amethyst so awesome. See them in Steven Universe.
Basil Hallward is dominated, soul, brain, and power by Dorian. See them in Dorian Gray.
The black sheep of his family, Rhett Butler grew up to have charm and to see things as they are. He just doesn't give a damn anymore. See them in Gone with the Wind.
A believer in the pursuit of justice, Garrus Vakarian hates it when bad guys slip through the cracks of the bureaucratic justice system. See them in Mass Effect.
Klaus Baudelaire's photographic memory saves the lives of his siblings many times over. See them in Lemony Snicket's A Series of Unfortunate Events.