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The first does not appear sharp enough and the DOF is too shallow. A male subject such as this fellow normally justifies a full face inclusion in the DOF to allow sharpness to put an emphasis on his masculinity. In this case, the leading edge of his hat brim seems the point of sharpest focus. It ought to be the eye best illuminated.
For the second, the pose with the subject's front roughly parallel to the camera is a bit static. Placing her arms against her body displaces the tissues, adding the visual equivalent of significantly more weight. (With a very thin model, the same technique can help the subject appear better fleshed.) Placing her hand flat and parallel to the camera plane ought generally be avoided. Without knowing the models and without the camera/lens info but judging by the the apparent proportions of her face, I suspect the model was photographed from too close. Using a longer lens allows greater camera/subject distance. Being too close can make the nose and, depending upon the angle, chin, appear larger than the ideal. I'd also suggest bumping the hue slightly (in PS, +1 to +3) to improve her skin color. (Very minor adjustments of the hue can often improve skin tone.)
It would also be wise to include the color profile info in images for the web, especially for critique. Otherwise, the color rendered on a browser may not be the one you intend. For example, the skin color in this image renders differently when displayed on Safari and displayed on Firefox when color management is enabled because in the absence of color space info in the EXIF data, Firefox assumes sRGB and Safari does not.