I really like this, you've blended it all very well, I think you could maybe blur the right hand side a bit to add a bit of depth, but apart from that its great.
You could also try adding a bit of contrast around the body, which would bring out the light parts and darken the rest, making it look more like there is a light shining on them. Be careful adding text, alot of people ruin a good gfx by adding bad text, for an image like this you should keep it subtle.
The only final thing I have just noticed is there is a 1px edge on the render, where it hasn't been cut out properly, you will want to remove the to clean it up.

Thanks for your reply tobyb
yeah, actually i made a 3 px border, inner 2 black and outer one orange, do you know what is the font used in singature bars? i know its common but im just starting on the GFX side hehe.

PS: i noticed too that i left my render with a little white border which kinda messes up a bit right? and on the right-top side there is a out of place thingy lol.

EDIT: i might upload a kinda wallpaper i made with the same techniques too, but its kinda large so it might wait :S

hmmm, my new sigs border doesnt look nice with the black asta background....

The shadows don't appear to agree with the light source. If your facing side and right wing was darker (maybe as dark as your left leg) with just a thin line of light around the left side of your body and left wing (looking head on)I believe it would give the total picture more depth.

Sorry if I butting in where I'm not wanted.

Holy Moley! I now see that I'm a year late on this -- is my face red?