Princess Mononoke
Now that's an Epic. Very high on my animated film list, I'd think. The plot was very engaging, not to mention the very well-done thrill and action sequences, which are interesting to see in an animation (for me). World and character building is exceptional, which I wasn't expecting. The pacing and plot mean a very high rewatchability. The score was also better than I expected, which is amazing, considering Miyazaki.