I feel that with your sigs the pic is always too domianting, you should really take down the size and work on making it flow with the background better. This is a good background, but it doesn't match the pic with how you have it. Still a good job though, your text is getting better.
<div class='quotetop'>QUOTE (Fabolous @ May 5 2006, 10:34 PM) <{POST_SNAPBACK}></div><div class='quotemain'>the pic is too big. and the bg has to be more than just brushing.</div>Well said. Picture should not dominate 3/4 the sig. Try making them smaller and adding some more text.
I agree with what Jusblaze said. Picture takes up way to much room. All your backgrounds kinda look the same