I pretty much agree with everybody else. It's not really bad, but its not all that good either.
you are really at the point where you could REALLY take you sig making up a notch or two. The main thing that I can say is that you aren't going to improve much if you don't start to try some stocks in your backgrounds. Look for some random stock photos and set them to different blending options (linear light, linear dodge, etc.) on a dark gray background. Put a gaussian Blur on the stocks if you need to to make it more abstract. That will vastly improve your sigs fast if you give it a shot.