From the woman over, the sig feels too light. Darken it up, but not so much to kill the nice effects you've got going. For the text, I'd say just stick with something simple, like lowercase Arial.
Lol, ye i added it and made it look lighter because it just looked so dark before i added the light source... Then again i like over did the lighting source o.o. I ll post one without the lighting. Without any lighting added.
Um... Its kinda messy with all effects everywhere, but I would love to see you continue with this style to see what you can come up with. I give it 7/10
Needs depth... and I mean, badly. It's basically, a render, a black background, and some random foreground effects and dots and stuff. This has no substance.