Because you like Norman Bates in Psycho
Don't worry about this forensic scientist offing you unless you're a serial killer yourself. (You're not, right? Just checking.) See them in Dexter.
V is a violent anarchist with literally nothing left to lose. But, he might have a point. See them in V for Vendetta.
Cyclops shoots lasers out of his eyes, destroying anything in his line of sight. See them in X-Men Series.
An ambitious man of science, Norman Osborn has become green with envy over Spider-Man's powers. See them in Marvel Cinematic Universe.
Miss Havisham is the creepiest old rich lady in town. See them in Great Expectations.
Krusty The Clown somehow makes life sillier and more somber at the same time. See them in The Simpsons.
Meat Boy tenaciously throws himself into danger, and when he fails, he immediately gets back up and tries again. See them in Super Meat Boy.
Blunt but anxious, Gretchen Ross bonds most easily with those who have lived tough lives like she has. See them in Donnie Darko.
Dante Alighieri is a crusader fighting his way to absolution. See them in Dante's Inferno.
Arthur Dent is an incredibly normal man on an incredibly abnormal adventure. See them in The Hitchhiker's Guide to the Galaxy.
A good-natured and academically minded superhero, Dan Dreiberg can still get his hands dirty in a fight. See them in Watchmen.