My overall impression of most of your images is overblurred and oversaturated.
I'd suggest calibrating your monitor first of all. Secondly learning some advanced skin retouching techniques (d&b, Inverted High pass, healing/cloning...)
In a few of the images you have gotten rid of most of the shadows by simply blurring them out making them look very flat.
There are a few really good DVDs out there if you are willing to spend the money.
http://www.digitalphotoshopretouching.c … ials-dvd-2
http://www.digitalphotoshopretouching.c … ials-dvd-3
and to top it off
http://www.grygarness.com/dvds/beauty-r … ng-dvd.htm
All of them are really really good and teach you almost everything about reatouching.