Because you like Kenny McCormick in South Park
A stylish agent, Agent J would rather improvise than play by the rules. See them in Men in Black.
A scary monster on the outside, James P. Sullivan is really a softie on the inside. See them in Monsters, Inc..
Reckless, vulgar, loud-mouthed: that's what makes Amethyst so awesome. See them in Steven Universe.
Kubo is a storyteller at heart who's tapping into his sense of adventure. See them in Kubo and the Two Strings.
Scooby-Doo always keeps his priorities in order: eat snacks first, solve mysteries later. See them in Scooby-Doo.
Bob Belcher runs a lonely burger joint, and even though his wit is lost on his eccentric family, he doesn't let that faze him. See them in Bob's Burgers.
Peter Venkman's "research" projects are designed to get undergraduate students to sleep with him. Though it turns out he can bust ghosts. See them in Ghostbusters.
Linda Belcher doesn't prescribe to what society deems as "normal." She narrates her life through song, much to the alarm of everyone nearby. See them in Bob's Burgers.
Dewey Finn will rock you. He feels rock and roll in his blood and guts. See them in School of Rock.
A grumpy tourist trap owner, Grunkle Stan has a few deep secrets. See them in Gravity Falls.