Because you like Faye Valentine in Cowboy Bebop
Born and raised in the darkness, Bane is determined to have the city totally under his control so that he can demolish it. See them in DC Extended Universe.
A born psychopath, don't expect Michael Myers to understand the difference between right and wrong. See them in Halloween.
Finn is the world's last human who's "all about" understanding right and wrong. See them in Adventure Time.
Thor is Asgardian nobility who is tickled by how us earthlings live. See them in Marvel Cinematic Universe.
It turns out the girl of your dreams just might have dreams of her own. See them in (500) Days of Summer.
Kathryn Merteuil may be a vain sociopath, but you won't be able to look away. See them in Cruel Intentions.
Dipper Pines is investigating a truly strange town during the world's wildest summer vacation. See them in Gravity Falls.
R2-D2 has been in the galaxy saving business for decades. Not bad for somebody whose vocabulary is limited to "beep-boop." See them in Star Wars Series.
There are certain souls the surprisingly sensitive Death would rather not reap. See them in The Book Thief.
Mark Zuckerberg has achieved everything he's ever wanted, and he's proving to the world how brilliant he is. But happiness eludes him. See them in The Social Network.
Carl Fredricksen is a crotchety old man who may just have it in him to take one last, great adventure. See them in Up.