When I was a kid, Disney's movies were enjoyable for me to watch, but not really funny (the "Little Mermaid" is a good case in point-I love the movie, but there was little ha-ha humor in there.) But, over the years Disney has slowly gotten funnier; they had already perfected the dramatic moments. Now, you have to look at each movie individually. "Aladdin" was meant to be mostly funny, which is why they contracted Robin Williams to play a major part. Likewise, "The Hunchback of Notre Dame" was meant to send you into giggles at random moments, and it is my opinion that the gargoyles and Phoebus pulled that off perfectly. But "Pocahontas" and "The Lion King" were mainly dark, introspective-sort of pieces. Some humor, but when you have star-crossed lovers in the midst of a war and a sympathetic character death, the humor is lost.
However, the "Emperor's New Groove" is a laugh riot. I can't remember the last time I laughed so hard at a Disney movie. Even though he spends most of the film as an absolute jerk and a spoiled brat, Kuzco is absolutely tongue-in-cheek hilarious. And the witch and her henchman had me holding my sides several times. Even Pacha's family was funny! I especially love his wife-she was really on top of things, even though she was pregnant and trying to control two small children and help outwit the bad guys.
The animation is superb! The colors are bright and clear, and the movements are very fluid. I had to suspend belief with the llama's movements, but he was a talking llama, so who am I to say that he can't sit like that or walk on two legs.
The voices were entirely appropriate to the character; Disney did a fantastic casting job. John Goodman did an excellent job with the calm, down-to-earth llama herder Pacha, David Spade is probably the only one who could have pulled off Emperor Kuzco, and Earth Kitt was the perfect choice for the put-upon, cynical advisor Yzma.
All in all, this movie is another in a very long line of Disney Greats.