The vectored (I'm assuming it's a vector) character looks nice, but the background looks too rough. Maybe try creating more of a scene. If you don't wanna do that, try smoothing it out a little bit. Also, the text has two problems, 1) The Color clashes greatly with the rest of the sig, and 2) The font is, in my opinion, not so good looking. Overall, the sig is very good, just smooth things out and try to make sure everything doesn't look out of place.