A Pirate's Curse

This is really cool and moody and dreamy . . . I like how atmospheric it is, and the nice green tones as well. It reminds me of a velvet painting, actually!

I have two suggestions as to what could be bothering you about the photo. The first is the perspective of the clouds in the sky. In the stock picture itself, it looks like it was taken by someone who was pointing their camera straight up into the air, however the point of view of this picture is from someone looking straight out on to the horizon, which would change the shape and perspective of the clouds. Usually clouds don't come right down to the horizon, so if you were to put some sort of mask or gradient or erase the clouds so that they fade out towards the horizon, it might make a difference (hard to say, though - I don't think I've tried something like this myself, and I can't really say if the things that make sense in my head would work out in RL!)

The second thing is where the water meets the sand. When water (especially stormy water) runs up onto a beach, the waterline is a lot more erratic (i.e. less of a straight line) and shallow too, and therefore a bit more transparent. Again, playing with masks or gradients may work here too . . . just to soften that line a bit more.

This is a nifty vignette you have going here. The ghostly whisps of smoke surrounding the ship are a nice touch!