What the fuck is with EVERYONE saying they need to blend everything, atleast a little bit?
I think this sig looks good, and I dont think you would need to blend it to make it better. You could blend it, but I dont think it'd change the overall look of the sig. The fact that the image sticks out of the bg is nice.
Id prolly change the text, because you have a somewhat grungey style going to your sig, and the text is overly nice and calligraphic. Otherwise, and this is me just being anal, make the circle at the top left corner bigger, so it sorta covers the entire corner, if that makes sense.
Otherwise, in my opinion, its some nice work.