I like the last one the best. did you use two flashes?
funny you picked the third one. I used the 50mm for these and the last shot was actually OOF although it does not seem like it. It also has the most sharpening done to it to make it look in focus.
My skin looks pretty accurate on the first two.
I used the Sigma wirelessly and it was about 10ft away from me to the left. There are actually some shadows if you look carefully.