Even though you watch some episodes Kuzco said that he learned his lesson, he never does, he's still selfish, arrogant, and lazy. He only does nice things when he has to, or when somebody tells him that somebody has to do it.
I especially hate those awkward moments when the characters just pause, especially Kronk and Yzma.
They also get some objects from the future and it's also a little disturbing when they use it, like when Yzma and Kronk used an mp3 player.
It's also annoying that Kuzco uses a 'remote' at parts of the episode whenever he's humiliated and usually tries to skip that part.