I've stayed at all 3 Disney hotels -- I know there are people here who like the PPH, but I am not one of them. No one in our family liked it. It's the only one of the Disney hotels that wasn't originally a Disney hotel, and it looks like it. IMO it's very generic looking, and not very "Disney." And the pool doesn't compare to either the GC or the DLH. We did have a theme park view, and that was a GREAT view, especially at night. But since we were rarely in the room at night until we were in bed, it didn't make up for the lack of ambience in the hotel itself.
We moved to the GCH on that same trip. Love the GCH. It is one nice hotel! Although not "Disney" in the sense that the DLH is Disney, the common areas are just beautiful and so relaxing. We stayed at Animal Kingdom Lodge at DW and it reminded me alot of that (minus the animals!). We also had a park view room there. It was a different view, probably not as good of a view at night as the one we had at the PPH, but basically our room overlooked the Grizzly River/Soarin' area and it was a fun view during the day. I couldn't comment on the non-view rooms at the GCH. They do have bunk beds at the GCH if that matters to you. We stayed near the "secret exit," and was was really nice being that close to the park entrance.
Anyway, if your main concern is the pool, I'd do the GCH hands down.