Whatever you done to that render ruined the overflow of the sig - badly. I like what you did with everything outside of the render, nice colors + awesome text blending, however, the right side looks pretty "appealing" moreso than the left; possibly try to even out the effects on both side. The render now. The arms looks messed up like crazy. Too much disortion, guessing you use iWarp for that. Really, just the overly done disortion gets bad for the eyes. I say though, you're good. Looks to be some abstract brushes with a bit of iWarp here and there, some layers that deals with the hues/sats. Other than that, good job; some details that got done over here and there that doesn't match. ***Colors don't fit to my liking; it's very monotone for me. Maybe this could be why I'm criticizing your sig a lot. You put no emphasis on the color, just mainly black + one other color, and maybe some lightings (in a lot of your sigs). Try going for a bit more variety, like the render matches perfectly with red + blue + black (well, this will be on the factor of: Can you pull it off?). Keep trying, you'll eventually get it.
First of all, read up on the Rule of Thirds and stock placement -- I know we haven at least one tut here on it. It'll improve your sigs by a lot. I'm not really in love with what you did with his arms -- It kills the flow. Right side looks nice, but blur some areas in it for depth. The lighting is non-existent, which is bad. Like lmfaofoflox said, your colors seriously degrade the sig. They're all much too monotone. Look at Cin, Chaser, Moodkip, and the rest of our sigs -- they have a variety of colors in them, not just one. Read some tutorials on coloring. One of my favorite methods in Gimp is doing a Deep Sea Gradient Map and then an Incandescent, then moving the Incandescent under the Deep Sea.
