Upload & Sell: On
He does seem a tad low in the frame. The extra space above him doesn't add any significant information for the viewer, so you've got some room to play without losing anything in the process.
Not being a portrait person, I hooked up with a company that shoots college graduation ceremonies and went through their curriculum for shooting grads. It was interesting in several ways to get "behind the scenes", but the "nugget" takeaway was their compositional hint/ROT to imagine a beer can sitting on top of the person's head to gauge how much negative space to use for framing above them.
I realize that shooting grads is a fast paced production model (manual focus only, btw), and doesn't have the other tenets associated with portraiture as it is really event production. But, it is just one of those things that I "tucked away" as a crude barometer for potential consideration. Although portrait shooters may suggest that it is a bit too "canned" ... ... it's a nugget I thought I'd share.
They had a pretty slick interactive training setup with a tethered camera to graduation footage projected to lifesize and you had to position and shoot in "real time". Way more challenging to sustain than one might think.
In case you are wondering, even though I was offered to be part of their team for shooting (my daughter's graduation) the university, I (with reluctant wisdom) passed due to realizing that my arm (post injury) hadn't recovered enough to be up to the task on a reliable professional level / pace for hours of continuous shooting. But you know I was watching them work throughout the ceremony, studying and appreciating their coverage and the things they had shared with me.
PP ... just a tad overstylistic/grained/sharpened in the face for my taste. I think it is mostly due to how it seems incongruous with the rest of the image since the effect appears localized.
Capturing the expression ... seems to be up your alley ... and this one is no exception. His gaze/tongue play well together to present the "realness" of it.