Because you like Jason "J.D." Dean in Heathers
Victor Frankenstein can create life, so he's pretty awesome if he says so himself. See them in Frankenstein.
His name is Inigo Montoya and whoever killed his father should be prepared to die. See them in The Princess Bride.
Eric Forman's interests include smoking weed, collecting Luke Skywalker memorabilia, eating Fatso burgers, and making his dad mad. See them in That '70s Show.
Claire Standish is a popular, perfect princess who's deeper than she seems. See them in The Breakfast Club.
Xander Harris' life motto: laugh in the face of danger and then hide until it goes away. See them in Buffy the Vampire Slayer.
Sweet, reserved, and intellectual, Cordelia Foxx would do anything for her students. See them in American Horror Story.
Donkey is proof that if you're annoying enough you can change the world; he's the reason that his friend Shrek does, well, anything. See them in Shrek.
Catwoman might be slightly unhinged, but you can't say this feline villainess isn't confident. See them in DC Extended Universe.
Louise Belcher might be just a kid, but she can manipulate just about anyone with a pulse. All in the name of fun, of course. See them in Bob's Burgers.
Morticia Addams hates anything bright and cheery and loves all things ghoulish, ghastly, and violent. See them in The Addams Family.