The work you do does seems like you've spent hours and hours on them, something I don't have the patience for. But looks good because of the effort.
Me, I want to do more to my sig too, but I was afraid to mess it up, lol. I was going to lighten (transparency) the girl a bit more to get the focus off of her ,lol. Then people would look at my specs more. I don't have the greatest of specs but it's the idea. At the same time, I like her in there because it does make it pleasing and even a bit exciting since this forum are mainly dominated by males.
I was also thinking on adding more designs and logos in there too which means I'll have to shrink the font size, etc. Lots to do.