i was gonna say it looks a little simple too, but the text is OMFG i wish i could do text like that haha its perfect!! great job altogether. if you like making the sigs bigger i would do so that way you can include more and then just minimize it all a little bit when you like whats comes in the end.
plain doesn't necessarily mean bad ---- im luvin it though ! maybe just a little bit of texture in the back would fix it. great tag none the less... awesome text placement with the pen toolin'
as many ppl have already mentioned its a little bit to simple/plain but it has alot of potential try playing with it alittle more and im sure the outcome will be amazing regards breezer