We just came back and before this trip I would have said MK, however, AK came out on top this time. I enjoyed the rides and I thought that the shows were great here. And, although all of that foliage seems to keep that humidity hanging around, it also provides some well needed shade. Perhaps it is because Pandora is so new, but there was a great energy in that park and an excited vibe from park goers that just wasn't present in the other parks. Some good eats are over there as well. I can't tell you where you should spend the most time this year, as I don't know your circumstances, but we spent the most time in MK because of the kids, but wished we had more time in AK and Epcot.