I love silhouettes. You might want to put some more things in the background for interest. You might also want to go in and smooth out the edges with the eraser on low opacity and /or the blur brush. It's more pleasing if there aren't pixelly edges.
Well.. the pic isn't done. I'm sure it's gonna be great when it is. Silhouettes are one of my favorite kinds of pics, too. Good job so far, blackmamba.
drawn in 6 min