Very nice, and a good eye for subject material. A tighter crop on both sides and bottom will add even greater impact.
Central positioning of practically any subject, even one as strong as this, causes the eye to have too many places to go, making it less comfortable to concentrate.
Regardless, it's dramatic and well conceived.
What makes this shot for me is the unique blackness of the water and the way the water curves near the leaf. My only suggestion would be to clone out the blurred leaf. I, too will be faving this one.