well, you have the focal in a good spot regarding the "rule of thirds" but the background has a hidden flow to it (top left-bottom right) the render dosn't follow that flow. The way you cut out the render is just.... bLaH. There is no light source witch is a VERY bad thing. you also have no sense of depth in this signature. You should also blend the render in with the background some how.
it snot bad but it need lighting effects, and a gmap cause its to dark and make the text better. over all like i said its not bad just needs minor improvements 8/10