Flow

I like the feel of the water that you captured, very nice. Exposed especially well. If it were mine though I would lose the greenery in the upper right corner and perhaps dodge the rock band (or some shadow adjustment) slightly to bring out some of the detail. Otherwise very nice!

Great feel for the flow of water here. I think you could crop about half the dark rock wall and put the emphasis squarely on the current. I love the light on the fg rocks.

Nice light on the foreground rocks and nice exposure for the water Bob. I agree with slightly cropping the top and a little more shadow detail. Very nicely done image.

Bob,

I like how you've isolated just this section of the flowing water and I like the shutter speed - just right. good color too and exposure in the water. I like that this is also against the dark wall, but perhaps too much? Maybe not though as it does provide a little context of the location. I would though at least crop some from the top to get rid of the green plant in the corner. also, both versions appear a little soft; not sure if that is web sharpening or with the original. I'm wishing the foreground rock and bg wall were sharper.

Lon

Great contrast between the fluidity of the water and sharp edges of the rocks. Over time, as we know though, the water will eventually smooth those sharp edges. The dynamic range within the water gives it a strong sense of texture.

I wasn't initially sure how I felt about the very dark background, but I believe it helps to bring out the luminance in the water, and the subtle diagonal "strata" in that are consistent with the flow which seems to be toward the left.

If you are interested in trying an experiment, see how you react to it after a horizontal flip. I find often that I feel more comfortable when images flow from left to right; and for me that is true in this case.