I like the shoulders.
One concern I see is that the eyes and nose are based on an even pixel width (4 pixels) while the mouth and chin are based on an odd width. I think this can be used to show a slight turning of the head, but it's also easy to mess up your alignment of facial features.
I think the eyes and nose are one pixel too high - should be one pixel between mouth and bottom of nose.
I actually like the hairstyles in your original post more than the newest version. They had clean simple lines and kept out of the way, leaving the viewer's focus on the face (which would be talking and whatnot).
I think the new greens are a little strong in contrast.
Anyway, here is an edit. This was difficult to do without adding colors, I could easily add 4-6 more shades. I'm not sure that pure white is that good of a choice.
1. Original. the yellow ball is me figuring where the light would hit (the white spot). I came up with from the front, a little to the left, and a little up.
2. Edit the face. A bit more of a babe, but not too sexy. Attractive but no makeup.
3. Edit the shirt. I think a military uniform would not be very form fitting. The breasts are there, but they are subtle. Using a lighter green color. I thought reducing the details on the shirt would also help push the viewer's attention back to the face. But that's just a guess.
Thanks for posting. I let me procrastinate on my own stuff.
Tourist