Composition in #1 is great, imo. You got the foreground interest (woody thing, not sure what it's called), middle ground (water) and background (trees and sky). You have also, which really makes this shot I think, framing along the edges. Those branches really adds to it. The image has leading lines that worked very well on me, the image has a feeling of depth. The place seems idyllic. It has a warmth to it that's, to me at least, is pleasing. I like this.
#2 is a nice shot, but it's not anything extra-ordinary for me. Too much sky, I think. It's a little flat, could do with some more contrast. Not really sure how I'd do it, I can't visualise the surroundings there.
#3 doesn't really do much for me. I'm not feeling the mood, so to speak. That pole is in the way, I think. It's placed right at the edge of the frame.
#1 is a winner, imo.