Mine for this year:
1) Tallgrass. I wasn't expecting too much from a short daily fee course in the middle of (non-Hamptons) Suffolk County. It's a terrific, fun little course with a lot of interesting, cool holes and great greens and bunkering. Land is flattish but Hanse did a great job with what he had. I look forward to playing there many times next year.
2) Bethpage. Not sure if a top 50 world course counts, but I had heard some negative comments, and also expected it to be borderline unenjoyable due to difficulty. It was hard, but that wasn't the case at all - very fun course, and the size and scale of it are really something to behold. The round did take a while, but no longer than other publics anywhere near NYC.
3) Kingsley. I had read mixed reviews, though knew some people were die hard supporters. I can now see why! I was blown away by the place, so much fun, so many great holes, and so visually stunning. Not sure if I can make it back again next year, but this is high on my list of places I want to play again.No idea how this isn't a US top 100 course (not that that matters).