I like the last two the best.
The last one has nice colors, and the leading line of the shore is very good. But it looks a little crooked, like the horizon isn't quite horizontal.
In the second-to-last picture, I like the duck, but I'm not so sure about the other foreground elements. I can't tell what they are, and somehow the big, black outlines are a bit distracting. If it was a smoother shoreline, like the last one, I think that would be better. Also, if he sun wasn't right in the middle I think it would feel a bit better. If you were a few steps to your right as you took it, zoom in a bit and maybe the sun could have been about 1/3 in from the right of the image, an the duck about 1/3 in from the left. That might feel more balanced.
It's a good scene. Worth a few pictures, for sure. 