I saw the Fenton photos and the Matisse exhibit on the Fourth of July (I just love the fact that the Met is now open on holiday Mondays - gives us people who tend to stay in town on holidays somewhere to go). The Matisse exhibit is literally breath-taking: there's something extremely cool about looking at the portrait of the woman in the purple-and-white striped robe hanging on one wall of a room, and then turning and seeing the actual robe in a display case against another wall.
The Matisse show was quite crowded, so to leave it and go downstairs to the Fenton exhibit, where there were only two or three other people, was like a breath of fresh air. I liked the photos of church architecture a lot, was less taken with the ones of the wild Welsh landscape - but then I tend to prefer man-made structures to the great outdoors, in art as in life, so that probably isn't surprising.
Don't leave the Met without seeing
The Duccio Madonna
It's the most costly acquisition ever made by the Met (and has gotten a lot of attention in the press for that reason), but dollars and cents don't seem to matter when you're looking at it.
That was very helpful. 
