Few splotches of stuff, then the rest is just absent of anything. It also seems too big for what you were trying to do, or maybe that's just because I'm way too used to seeing 120px sigs nowadays.
I'm not trying to be some sort of anti-bandwagon jumper, but I'm with Kirk and Jackson; there's just not much appealing about this sig. The mirror part is obvious, so there's little blending. And I'm not sure of what technique you used to make the render and whatnot, but knowing you it probably wasn't too easy, though that doesn't change the fact that it's a plain, and somewhat dull sig. Sorry Lt, not feeling this one.