Besides the picture quality issue Ryoko brought up in the post above, I think the sigs look great. They have a great style. I'm not a huge fan of CS, or a fan at all. But a lot of people are...so good work.
You seem fairly attached to that background image, which would be alright if the sigs were part of a series, or perhaps all in the same clan. But the individual stuff jumps around too much. I mean, you have that same technical look for the BG and BG layers, yet everything else is wildly different. The type is odd fonts, the shapes use extensive (perhaps excessive) angles, I don't think they all fly in that technical sense.