i think you were a bit lazy with this. the colors could have been done in 15 minutes without surprising me. also, for an image lacking in detail, its not a good thing to make it so big, it just makes it more obvious.
also, i wonder why almost all artists here lack the ability to do something creative and unique. out of ten colorings, at least three have the plain white glowing background, and eight out of those ten follow the exact shading in the manga... that is just too boring for me... :S