I think there is too much contrast in the PP. One or two pictures is fine but the whole series seems a little too much for me. Also, the strong sunlight causes strong shadows as well. An example is #05. The left side of the face has too much shadows. Also strong light also make the face look too harsh. In portraiture work, in general, you want to light up the face and soften the look. Only in really specific cases (artistic value) will you try shadows. Some use of diffused flash, lighting or reflectors will make the pictures come out very nicely. Another point, the picture of Abel taking off the sunglasses. I would expect the focus to be on Abel's face. Unless you are trying to do an advertisement shot for a sunglass company, so the focus is on the shades.
Overall for a newbie, very well done!