Nice intimate study here Mike...I concur with most of the points raised by Steve and Mark. I like the shallow DOF but feel it would have been nice if it was just a
tad more?
Anyway - here's a repost with some suggestions...take them or leave them, I have a peculiar way and sometimes what I do doesn't work for anyone else (which is also okay

).
I basically ran a multiplied highlights layer (see Robert's sticky thread in the Wildlife main forum) at 30% opacity.
Then I added a dark vignette, just to pull the viewer's eye a bit more towards the head.
Lastly, some dodging of highlights and burning of shadows for depth and contrast....and a wee bit of sharpening to the eyes.
Would love to know what you think?