Composition/use of frame space: Very cood use of frame space. Stream leads the eye effectivly through the frame, and leads you to the wall looking at the outcropping.

Colors/White Balance:
Colors are ok but slightly unnatural (I have walked this section of Oak Creek many of times)

Exposure : This is an area that hurts the most on this shot. Hopefully you shot in RAW and can reclaim part of the blown red channel on the upper rock outcropping. I personally would have bracketed 2 shots of this for any blending needed from such a thing...if you have RGB histogram on your camera...make sure you activate it to avoid this.

Creative use of Aperture/Shutter : Not really applicable here....basicly maintained good DOF.

Perspective: Good perspective...your eye naturally follows the canyon well.

Creativity : Nice representation of a very rugged area....might have played with a few foreground objects to anchor the frame.

Emotion :...well..for me a lot as I have a soft spot for Oak Creek...one of my absolute favorite places in the world.

Forethought/Visualization: Pretty good. As stated though...finding a good anchor would have only helped.

Post processing: Here is another area of gremlins for you....the reds just dont cut it for me...under the outcropping is a bit more natural...bu all the brighter areas have a yellow/red overcast that is a sore point in an otherwise VERY well done shot. I would love to play with the RAW shot to see what I could extract from this....worth the extra effort.

Roman