We just got back on 06/02. We were there for 5 days, so we had plenty of time to do each park and then go back to the park we liked the most on the last day.
I have to agree about Hollywood Studios. I had high hopes for it, and it sucked ass. I was pretty excited about the backlot tour, and it was shitty. The kids liked the Honey I Shrunk The Kids playground. The Rock 'n' Roller Coaster and Tower of Terror were good attractions. Other than that, highly disappointing.
The Magic Kingdom was pretty awesome. We came back on the 5th day because the kids liked it so much. Space Mountain was a crappy ride IMO. From what I understand, they redesigned it last year. I like roller coasters that are fast, turn, go upside down, etc. But Space Mountin flat out just jerks you around, and it's pitch dark, so you can't even get ready for it.
Epcot was great as well. My favorite rides were Soarin' and Test Track.
Animal Kingdom was pretty good. Loved riding the Yeti.....rode it twice, actually.