Let me give you some advice/help.
Some members here have sigs and will use them for quite a while. If you want to get some people here, make up a showcase of sigantures like mine. This will at least give some members some type of look to what you can do, and see at what type of level you can develop graphics.
Also, in a few of your sigs, you add a outer glow. At some point, glow is good, but if you edit it and change the attributes you can create something a little better than what it is set at (Or in other words, changing things from the default settings can make good/bad things). At some point, in some of your fonts, make sure that the font STANDS OUT, because that's what members look at.
In some of your works, I see that your cutouts are good, but when placing them outside the document size, it gets cutout, just like your cutout of the Counter Strike Source image. I suggest you make a larger document size, then resize everything to fit in a perfect size, just like my sig.
Hope this helps out with some of your next stuff.