2nd There is an odd darker brown line from one smile line to the other
3rd One eye seems to be bigger than the other
4th The pupil on our left is larger than the other
5th The picture is off center. The cutoff of one shoulder creates an uncomfortable balance.
6th The picture is too cold - as in excessive blues and green.
7th The choice of blue suit, blue tie, and blue shirt along with the background accents the blue in his lips.
If this is someone's idea of a quality portrait, then his folks are going to produce some GREAT pics for us to make fun of in the future.
Other than the subject, I really don’t see much about it to criticize. It’s fine.