Because you like Vegeta in Dragon Ball Z
For Wreck It Ralph, it's not easy being the bad guy. Especially when you've been designed to destroy but really desire love. See them in Wreck-It Ralph.
A powerful priestess, Melisandre is shrouded in mystery and lots of red. See them in Game of Thrones.
Krusty The Clown somehow makes life sillier and more somber at the same time. See them in The Simpsons.
His murderous megalomania aside, Loki is quite charming. Just don't mention his strapping older brother; he's a tad jealous. See them in Marvel Cinematic Universe.
As a scaring Assistant, Mike Wazowski frightens children to collect their screams to be used as a power supply for the city. See them in Monsters, Inc..
Jesse Tuck dreams of finding someone to join his unusual family. See them in Tuck Everlasting.
Waylon Smithers would do anything for his boss, and would love to do a few things *to* him. See them in The Simpsons.
Brandon Teena is an adventurous young man with the courage to be himself. See them in Boys Don't Cry.
Everyone Barney Stinson knows is getting married or pregnant. But he's just getting more awesome. See them in How I Met Your Mother.
Part of an elite team of investigators, Abby Sciuto is the happiest Goth to ever work in law enforcement. See them in NCIS.
Though seemingly caring and calm, this motel owner has a mysterious streak of intensity. See them in Psycho.