In no particular order;
Lederach - There's always something invigorating about seeing work by an architect who pushes the envelope while staying somehow classically oriented without becoming completely unhinged. Probably 20% will hate it and another 60% won't understand it, but anyone who views golf as a unconventional adventure will relish it.
Engineers - A set of greens among the five most undulating I've ever seen or played, on land that stirs the senses and taxes the game. Recent renovations have made it slightly more fair, but it's a long, long way from anything close to vanilla. Exhilerating.
Tallgrass - How many great short par fours can you squeeze into one property? Enough to have Tallgrass among the creme de la creme of northeast public courses, even if it's virtually invisible in the bastion of great golf that is the Hamptons.
Gallery North - A strategic smorgasborg in the foothills above Tucson, there is enough variety and interest here to keep a smile on your face all day long. I kept waiting for a letdown, which never happened.
Merion East - A sign of a masterpiece is that it gets better with each play. A multi-layered orchestra in three parts, with a crescendo that resounds long after the last notes have been played. (EDIT - OOPS - just realized it said "played for the first time this year". Well, I'll just excuse myself by saying that playing it each time is like a new experience
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Merion West - An amazing routing that includes numerous holes that would never be built today. More's the pity. Easily the longest 5900 yards in golf.
Jeffersonville - I'm not sure that Donald Ross knew how good this course was, but there isn't a single shot out there that isn't fun and interesting. (DOUBLE OOPS - Does it count if I say that I played it for the first time with Kyle Harris and Doug Braunsdorf this year?)