This is your first engagement shoot?! I'm really jealous!
My favorite is the 2nd one. I love angled shots... not all work, but this one definitely does!
My next favorite is the last one, the close up. The line of the fence works for my eye.
I wish the 4th one weren't so centered. Nice pose, but I think it would have looked better shot landscape, and with some looking space on the left.
Nice composition on the 3rd one. The leaves frame them nicely (if only that one pesky leaf weren't overlapping his head). However I don't think the pose is very flattering to the bride to be. (Although I must say you showed her good side is every other shot).
The first one doesn't really do anything for me. Even if it were centered, as suggested above, the other two shots I mentioned would still be my favorites.
Very nice job with these!