The music was beautiful and well suited to the movie.
Like many Miyazaki movies, the animation (as always) is wonderful and nicely detailed which is also another quality that genuine Disney films lack (thank goodness for Studio Ghibli). Perhaps the portrayal of this message (and the tiny hint of San and Ashitaka's romance and Moro's views on nature) was what made the film so touching to me. Another wonderful aspect of the plot is that it sends a message - Protect the Earth and all will survive in peace - a message either discreetly or strongly portrayed in many of Miyazaki's films.
Although it her actions were environmentally damaging and wrong in general, she did it to help her people survive which is what all the species on Earth strive for. Even Lady Eboshi the most antagonist character in the movie had a reasonable motive for trying to get rid of the animal gods and cutting down the forest. There were no complete 'good' or 'bad' guys. Since it was a Studio Ghibli film dubbed by Disney I liked the fact that it wasn't a 'they all lived naively ever after' film. The first time I saw Princess Mononoke I was completely moved and surprised.
