I like all of them, though a few are more odd than the rest
Pom Poko is really weird. Mononoke was very good, but got stranger as it progressed. I wasn't too crazy about Ponyo, but it still has his signature feel to it. I own maybe 8 or 9 of his films on DVD. My favorite is still My Neighbor Totoro for some reason.
The grain is there in all of the early films; only in the recent ones is it not there. Kind of like old Disney prints, but the remasters of those are getting scrubbed clean unfortunately. I don't mind the grain, but there were a few times where it seemed almost excessive on this one. I'll have to pull out the DVD and compare. Having seen this many times, the PQ isn't what they improved most to me, it is the color, or rather what feels like a faithful capturing of the color palette he tends to use. Frequently, and moreso in this film, he uses earthtones spotted with bright colors here and there. What you can also see better now though is the actual hand crafted art itself.
This one has one of the more linear and consistent stories overall IMO, and though there is a fairly common theme to most of his movies (mankind's lack of respect for or exploitation of nature, nature fights back). While his stories are typically straight forward, it is how he tells them that makes them so interesting.
I didn't say it in the first thread, but I give this one a Highly Recommended for animation fans. It is one of Miyazaki's best.