Because you like The Terminator in The Terminator
Jim Stark is a teen torn apart by what the world asks of him. See them in Rebel Without A Cause.
A great galactic bounty hunter, Samus Aran is not as good at expressing emotions. See them in Metroid.
A suave proprietor of an upscale nightclub and gambling den, Rick Blaine is dealing with World War II and a broken heart. See them in Casablanca.
An ambitious man of science, Norman Osborn has become green with envy over Spider-Man's powers. See them in Marvel Cinematic Universe.
After figuring out how both the light and dark halves of his soul could co-exist, Jak is maturing into a real hero. See them in Jak and Daxter.
James Gordon happens to be the one guy in Gotham City with proper morals who doesn't also run around in a cape. See them in DC Extended Universe.
Emmet Brickowski is so upbeat it's not even human. Everything is AWESOME! See them in The Lego Movie.
Baloo is a fun-lovin' bear who just needs the bare necessities of life See them in The Jungle Book.
Accessing more than 10 percent of your brain can do strange things to anyone, and Lucy is Exhibit A. See them in Lucy.