A couple of years back, Japan's premier film publication Kinema Junpo published their list of the country's best animated features. They cheated a little bit, so the list includes 13 movies. Furthermore, Urusei Yatsura, The Little Norse Prince and The White Serpent share a joint 7th place. The rest of the movies share a joint 10th place.
I like this list. All of the movies on it are great, but the ranking of them is original, and the list leaves out several fan favorites - a sure fire way of generating discussion!