Brutally neat.
I think it's an odd concept for a piece of art, but normally it is the odd ones that get my attention. I understand how it is intended to be dark, but it also makes it difficult to comprehend the actual quality of the skull. You can tell some of the detail is there, especially the eye which I really like, but it is hard to tell how well that actual picture is polished. I really think the idea of it is cool, but just putting attention on the small things will bring out the picture greatly. Anyway, keep up the good work, man!