Remmeber; when doing text, make sure that it is readable, and doesn't detract from the main focal of the sig too much (if at all). And text isn't always needed. =] The sig is a bit too bright, and the lighting looks a little off...However, I do like the negative space (on the versions without text) and the contrast. Your current (the sig in your sig space) is the best version, IMO. Pretty good work. :3
Thanks both for the comments. I will try to use your advices for my next sig, AG Alx. I may darken it a bit tomorrow when I have some time, it is a bit late here.