Because you like Buddy Pine / Syndrome in The Incredibles
The witty Aku would be an ideal dinner guest, if he weren't a demon. See them in Samurai Jack.
Frederick Frankenstein is an eccentric (O.K., maybe a little insane) professor who is excited to be delving into his family's past. See them in Young Frankenstein.
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.
Gene Belcher dreams of a future in the limelight, and he doesn't let his lack of talent hold him back. See them in Bob's Burgers.
Moe Szyslak is the crabby owner of the grimiest bar in Springfield. See them in The Simpsons.
Prideful and psychotic tendencies combine to make Dr. Eggman a dangerous and villain who will squash anyone in his path. See them in Sonic the Hedgehog.
It turns out breaking open an ancient cursed statue will do funny things to a girl like Enchantress. See them in Suicide Squad.
A no-nonsense pro, Agent K has dedicated his whole life to his job. See them in Men in Black.
Dewey Finn will rock you. He feels rock and roll in his blood and guts. See them in School of Rock.
Macbeth was probably named "Most Likely to Kill His Rivals" in his senior yearbook. See them in Macbeth.
Count Olaf is a traveling actor, except he can't act and his homicidal tendencies make finding work pretty difficult. See them in Lemony Snicket's A Series of Unfortunate Events.