|Hi Disco! Welcome to the Critique Zone...
First take, this is a great shot. I'd change a couple of minor things with 20/20 hindsight, but not much.
Technical: Nothing to say here - this is fantastically sharp and the DoF control is superb.
PP: I'd bump the contrast a little more to bring out the structure of the head, and emphasis that shadow a little more - it provides an outstanding leading line. You mention having done some colour correction, but it still looks to have a slightly blue/green cast. This might reflect reality but I think it would be more aesthetically appealing if it were a little warmer.
Artistic: Again, very little to say apart from perhaps just a smidgen more space on the right hand side to balance it up? It's quite close to the edge. Other than that, the composition and structure are excellent.
If this wasn't just asking for the DNMC comments and really fitted the challenge, this shot would be a shoe in for a 6-6.5 score, maybe more. I have 6+ shots which aren't nearly this good. I hope you aren't put off and come back for more!