personally i like it though some aspects of it could be improved like
-use the zoom tool on your cropping pic and rub out the access of the pic u dont need to make it cleaner
-use the free transform tool so u can resize the image to suit a sig style size
-the text really suits the style of the pic but u should change the colour so it stands out more then just blending in with the background
-for the background just experiment with colour,renders,lighting effects etc to get a better feel for it
and finally cant express this enough but if your ever in doubt a colour doesnt suit consult an online colour wheel
gl with future works =P