C&C per req:
1. Very nice, love the light on the peaks. I wonder if it might not improve the image to crop a little of the foreground, esp. the rock lower left?
2. Very nice, great reflections, but the large dark area image left is a little strong; perhaps try and lighten that up or crop? Seems like a lot of noise, esp. in the sky; over-processing?
3. Excellent! Ideal composition, wonderful reflections, nice exposure. The only weak point is the sky, which would have greatly benefited from either further post (HDR?) or possibly the use of a graduated ND filter.
4. Nice, but not quite in the same category as the other three. Again a Grad ND filter could have increased the 'oomph' in the sky.
Just my $00.02 worth - your milage may vary.
~John