Pretty nice sig, I see you helped the flow by blurring the edges. But I would smudge the Background to help the flow a little more. Then maybe add a gradient map or something to help the color. Also maybe choose a different, slimmer, font.
BG is either too sharp or not good enough quality. Too much blur around Altair's body, and the text should be improved. I highly suggest finding a cool font at dafont.com