This is a lovely image to my eye.
The catchlights in the eye look great and the mono suits.
Might I respectfully suggest a square crop with his left eye falling directly on the intersection of the thirds.
Nothing wrong with it as it is but would be interested to hear what you think.
Thanks for the feedback. You might be right about the square crop alright. Its funny, I have never really been a big square cropper. I seem to think in rectangles mostly. Having said that, looking at the image now and where Jacks gaze is focused, a square crop might work better.