The exposure and composition appear to be good at first glance, but the processing has sucked all the detail out of the highlights and overly flattened the images. The histograms confirm that there is little to no detail in the mid-tone to highlight range. This is particularly problematic because your meter is placing the exposure of Caucasian skin in the 15-18% gray range, precisely where you need detail. Further, the heavy vignetting creates the illusion of your highlights being even brighter than they actually are, which doesn't help when they're already too bright to begin with.