#1 I like the treatment of the sky - lots of interesting cloud details, but the right side of the composition carries more weight than the left (the bench and the tree branch are the culprits here) so it feels unbalanced. The tonal values are a bit flat as well, which lessens the impact. The leading line of the boardwalk is good though...
#2 Better. The sky has more impact due to the increased contrast of tonal values, the boardwalk leads the eye deep into the image, but this too is heavy on the right side. The grasses in the immediate left foreground help some, but they are not enough to balance this fully. I agree completely with c.cloudwalker on the change in point of view - that would have added a good deal of impact to this one.
#3 I sort of like the composition here, but that leaning piling is distracting as presented. Again, I completely agree with c.cloudwalker about the exposure - the blown out sky is a magnet for my eye and detracts heavily from the rest of the scene. There is a lot of detail in the pilings that we are missing out on because they are lost in heavy shadow. If this were evened out quite a bit (shooting at a different time of day perhaps) this would be a much stronger image.
#4 This composition is very closed, and the foreground sand does nothing to add to this image as presented. My eye is pulled right to the blown sky in the center and it just stays there. The overly high values in the mid-right are also a distraction. Here again I think that you would be better served if you come back when the light is not such a problem. I would also suggest that you consider moving forward to eliminate some of the upper part of the image (the underside of the pier) and the foreground (sand), neither of which does anything positive to this.
- Randy