I think the background detail is astonishingly good (details have always been one of your strengths) and I love the shadow across his face, but it does a lack your usual flair (perhaps it's a lack of distinct definition in the sky?).
That's no complaint since a) lately, you've been churning out colourings at a rate that everybody else can only dream of and b)they've all been absolutely top quality. Having said all that, I think the beauty of this is that it's clean and simple and smooth.
Its just a great picture technique wise but maybe the picture is the problem. Since most you must remember that the weakest part of your picture will always be in the center,so anything in the center will not be very intresting...And there is nothing else to make the pciture flair...
You did a great job the picture wasnt really working with you.