Great job! subtle and nicely done. I do have some suggestions though if you don't mind.
It looks like you using a sing tone for the hair,skin etc. When nothing on a person in real life is monotone.
I'm posting an example and the changes are subtle, but you can see where I added a a dusky, rosy color to her cheeks, nose eyelids and other areas where blood flow is close the skin surface. I just went in with a soft brush set to color mode. This infuses a little life and keeps the skin from looking plastic. Hair is also multi-tonal, so I added a slight honey blonde to the shadow portions and jazzed up the highlights with the doge tool.
Like I said nothing drastic, but it pumps that extra little bit of life into a photo.