Because you like Grunkle Stan in Gravity Falls
The Ice King is lonely and looking for a princess to sweep him off his feet. See them in Adventure Time.
Anger is a cantankerous hothead whose job is to get others riled up. See them in Inside Out.
Reckless, vulgar, loud-mouthed: that's what makes Amethyst so awesome. See them in Steven Universe.
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.
Eugene H. Krabs is a greedy restaurant owner who won't let a dime out of the reach of his claws. See them in SpongeBob SquarePants.
Patrick Star enjoys life's simple pleasures because he can't wrap his brain around anything more complicated. See them in SpongeBob SquarePants.
This bite-sized, power-hungry plankton is determined to uncover the secret recipe for the Krusty Krab burger. See them in SpongeBob SquarePants.
A karate master/rocket scientist/squirrel, Sandy Cheeks is the only one who can clean up the other resident's messes in Bikini Bottom. See them in SpongeBob SquarePants.
Mother Gothel is a great mother as long as you never, ever, break the rules. See them in Tangled.
Ursula will oh-so-generously grant your wishes for a price. See them in The Little Mermaid.