First of all, I like it. I heard A.V.A is a great game (I still have to check it out) and I have to try to make signature themed by A.V.A too xD.
Back to the Signature and Avatar. The Avatar ain't bad, it's just a bit too bright, same in the signature. The military font you used for your name and text beneath it, doesn't quite fit. I would suggest Verdana or another font, which looks quite normal. Further you probably should read some tutorials about creating a background and blending the render in. All after all you've done a good job and I think you can improve