I can't tell you how much I love Miyazaki's films!
Spirited Away and Princess Mononoke are my favorites...the art is detailed in all of his films, but in these it was absolutely gorgeous. The stories were as detailed as the artwork.
I've seen Nausicaa of the Valley of the Wind, but it was a long time ago when Toonami ran that 'Month of Miyazaki' special on Cartoon Network. I've got to see it again.
I loved Castle in the Sky, not so much the whole movie, but the intricate steampunk setting it was in.
Howl's Moving Castle had kind of the same vibe as Castle in the Sky, but it was entertaining in its own way.
My Neighbor Totoro was more funny than anything else; the father was so mean to his little children
I've seen Ponyo, and I have to say that I didn't like it as a movie. It ended too quickly, and the plot was kind of thin... Ah well. *shrugs*
But overall, it makes me wish traditional animation was still used popularly as a medium (particularly outside of Japan...)