I just went and saw Ponyo last Saturday. Once again, Mr. Hayao Miyazaki has graced us with another sample of his genius storytelling.
I don't like the commercials they show for it on TV, cuz they don't really do the movie any justice.
It didn't top Howl's Moving Castle as my favorite Studio Ghibli film, but I did like it a lot.
Thus far there hasn't been a single Ghibli film I didn't like, especially the ones directed by Miyazaki.
This man's attention to detail is astounding. Even the most minute details that nobody would never even think of, he made sure to get animated.
And also he has little to no dependence on computers for his brilliant work.
He even had the honor of making the first movie to ever win an Academy Award for Best Animated Feature Film, which would be Spirited Away.
Also a very very cute one.
That was one of two movie I got the chance to watch in theaters. The other of course being Ponyo.

If you've never had the pleasure of watching any of his movies, you are sadly deprived and need to go watch one right now.
Even if you're not a fan of anime, I'd recommend watching his movies. (My mom is a fine example of a person who isn't into anime but loves the work of Mr. Miyazaki.)
Out of bias, I'd recommend starting with Kiki's Delivery Service, because that was the first Miyazaki movie I ever watched. (And also this one is still my mom's favorite.)
Porco Rosso is also a very good one, and also My Neighbor Totoro, but my favorite by far is Howl's Moving Castle.
I know there are many more that I'm missing that were done by Miyazaki, but I can't think of them at the moment.

Edit: I thought of some more you need to watch.
- Nausic
Ä of the Valley of the Wind (Patrick Stewart is in that one. =3)
- Princess Mononoke (This one is kind of violent, but still a very nice story)

Of course, since we're talking about Studio Ghibli, there are also the movies directed by Mr. Isao Takahata.
I've not seen a great many of his films, but the ones I have seen I liked. (such as Whispers of the Heart, The Cat Returns, and Pom Poko)
It's not that I don't think Takahata makes good movies. His animation style is equally nice to look at, and the stories are also excellent.
I just think Miyazaki is a much better storyteller.

Oo, also. I had learned (during the time when my obsession with Lupin the Third was at its peak) that before founding Studio Ghibli, that Mr. Miyazaki was one of the head animators for the Lupin the Third series, and even directed one of the movies before retiring completely from the Lupin franchise. (This movie was Castle of Cagliostro)
Awesome movie. One of my favorites of the Lupin series. ^_^

Also, Miyazaki animated a few episodes of an old anime series called Sherlock Hound. (pretty much Sherlock Holmes with dog people )
Very cute anime. Highly recommended. Go watch it on YouTube right now, only twenty-something episodes long. ^_^
Even the episodes he didn't animate, you can see his influence in. It just has that level of quality.
For being as old as it was (I believe this was made in the 80s, but I could be wrong) the animation in every episode was superb. Worthy of a feature film.

But now I'm just rambling, so I think I'll stop now.
I think you get the idea.
I'm a huge fan of Hayao Miyazaki, and if I ever had the chance to meet him, I think I'd die.
Partly because I know he doesn't speak English, and I don't speak Japanese. XD