OH my GOD!!! your art is just jaw dropping Having spent a little time in CS4 trying to manipulate some stuff I seriously tip my hat to you sir, you are very talented that's for sure the shadows and shading are just sublime (and I don't use that word often)
I mean they look like actual photo's in the thumbnails its only when you click it you see its digital art.
Oh and my final thought is the hair you have nailed they hair on every on I have looked at!
I see what your saying he\she traced them, but in all seriousness could you do that?? because I couldn't...... so my comment still stands perhaps not as amazing as I initially thought but it is still very impressive!!