I have yet to see all of them, but my favorite's either Nausicaa of the Valley of the Wind or Princess Mononoke. I also liked Ponyo and while I also kind of liked Spirited Away, I find it to be a tad bit overrated.
_________________ The Local Video Gaming Lunatic
Recent stuff I'm into:
Watching: A Certain Scientific Railgun (ep.14, stalled), Hoshi no Kirby (ep. 71, stalled), Nazo No Kanojo X (ep. 8), Acchi Kocchi (ep. 8)
Reading: nothing