Great feel for the picture. DOF is a bit low, but that gives a feeling of depth. There appears to be a rainspot in the middle of the shot. I don't think it takes away from the picture because it isn't a print and it's basic editing, but make sure you clean your lens before the next time you go shooting :). I like that the sky matches the mood perfectly, with just a little lumpiness.
Interesting image--very graphic, if possible I would boost the contrast a bit making the brightest portions of clouds even brighter--it's somewhat dull.
The thumbnail on this looked amazing. I was a little disappointed when I opened up the image to see the silhouette was not in perfect focus throughout. I think the composition of this is great!!! And the black on grey background works reakky well. The soft focus in parts hurst the image a bit.