Nice
Just a few very minor things that I'd suggest changing if you go back: [IMO and all other such warnings...]
1) The rocks at the bottom are a bit too cropped (the shape is partially set by the black border unless I'm mistaken...)
2) If you were to move slightly further round, I think the sun would be less central in the picture (although I don't know if you'd lose the lovely curve)
3) Unless the black border is there deliberately based on comment 1, then I'd suggest you change it/remove it - I think it accentuates the darkness of the image, and makes it hard to see the edge of the rocks, which I think spoils it slightly.
That said, I really like the image, and those are but minor tweaks!