I like the expression and the subject. I find the post processing too intense in the way it smoothed the skin and generally detail. Wrinkles on the elderly can be quite photogenic, actually.
The image is a bit soft, tho and I think I would have liked to have seen more definition in his facial traits. also, the light coming from the back isn't ideal but that's just my opinion, very nice nonetheless. :)
There's a high level of softness (or noise reduction) that limits the strength of character in this man's face. Greater detail would make it more impactful. Good choice to go with black & white.