Because you like Screech Powers in Saved by the Bell
Nemo is a small fish in a vast ocean, but he dreams of seeing it all. See them in Finding Nemo.
It’s usually the good-looking, charismatic, play-by-their-own-rules types that get everyone into trouble, and Tyler Durden is Exhibit A. See them in Fight Club.
Yukiteru is a reclusive observer who would rather watch life go by than participate in it. See them in The Future Diary.
It turns out the girl of your dreams just might have dreams of her own. See them in (500) Days of Summer.
Bridget Jones is a wanton sex goddess, struggling 30-something, and semi-hot mess. See them in Bridget Jones's Diary.
Chaos is what killed the dinosaurs, and there's nothing Jason "J.D." Dean loves more than chaos. See them in Heathers.
A house elf, Dobby is loyal, compassionate, and yearning for freedom. See them in Harry Potter Series.
A hurricane of a human being, Marla Singer is destructive and unforgettable. See them in Fight Club.
Daria Morgendorffer is so defensive that she actively works to make people dislike her so that she don't feel bad when they do. See them in Daria.
Her unhappy childhood has left her unsure of the existence of happy endings. Mary Jane Watson hides her pain beneath a joke and a smile. See them in Marvel Cinematic Universe.
Gotham's unhinged Clown Princess of Crime will call you puddin', then punch you in the face. See them in DC Extended Universe.
Driven by guilt and rage, Kratos is less a man and more an unstoppable avatar of anger and hate. See them in God of War.