This is truly a very impressive picture although it's "kinda dark". But that has nothing to do with your work but only with the weather. I guess this pic would be even more impressive with a few sunbeams.... Nevertheless, great work from you... I like how you captured the running water.
It's a nice photo...a tad dark, but nice nonetheless. I would make your signature a little lighter (less opacity) but aside from that, it's a good arrangement.
"A piece of toast with butter always lands butter side down, and a cat always lands on its feet. What happens if a piece of toast is tied butter side down to the back of falling cat? Does it hover above the ground in perpetual indecision?"
I love the rocks in this piece. To me it's not a waterfall picture but a balanced nature shot. Sticks trees, rocks, boulders, and the lovely movement of the water. Very organic.