I actually like it, but the left is a bit too overpowering, which makes the right look empty. But that can be fixed in later sigs. Otherwise, C&C?

You're right about that contrast between the left and right, that makes it not work as much. Other than that, It looks pretty awesome, solid effects and cool lighting. Good blending as well.

I'm happy I complained,

I like this, nice lighting, decent depth, good blending, good effects and nice text. And I think the negative space works here, with that contrast. The flow could have been better, but that's expected when you placed it in the centre. And maybe you could also work on your colours a bit, as this is a bit mono, with all the cyan. Anyway, nice job, I like this sig, and it's great to see you try something different

Nice. I'll echo that the contrast is a bit much but other than that I love it. You probably could have pulled off the contrast very well if it wasn't so wide. Size is about the only flaw I see. But then, these library computers aren't that great for viewing graphic art. You used a render? If not, you do a good job rendering yourself.

^Yeah, he used a render. Same one that was in another sig that he did that occupied his sig on here for basically FOREVER... I like both of them a lot though, I'm not even sure which is better...