1. This is a nice image, but something about it just doesn't feel quite right. I think it might benefit to have seom cropped off the left. My eye keeps going to the large rock behind the trees, rather than taking in the water reflections and the fall color.
2. The blown out portion in the upper right is very distracting and the overall focus is off. Did you take this hand held? With a shutter speed of under 1\125 you need a tripod to avoid camera shake.
3. Beautiful image. Great compostion, exposure & focus. I wouldn't change a thing!
4. A nice shot, but It feels too tightly cropped. I think it would be better with more of the top part of the fall. Try a vertical crop.