I'm going to be picky here TK, since you've got capturing the person's expressions mastered.. You need to be careful about the background. While having the setting is important, in this case, the window and clutter immediately behind him is distracting. The venue was undoubtedly difficult to shoot in. Moving the subject around a little may have helped but would have changed the light quality (unless you were using a portable light for the front-right light). At the very least tidying the table behind him would have been worthwhile.
The strong light coming from the front-right is great, however the light from directly behind is distracting, as is the strong shadow from the object to the very right that us cut off.. moving that object would also have helped.
Looks like you caught an animal in its natural habitat.
Being picky; I wish that little bitty corner of 'something' (the source of the long shadow) were cropped off of the edge of the picture. It just bugs me.
I like the off-kilter perspective; give it a vague Picaso feeling.
TK, your people shots just pull me into them. I feel like they show the person as they really are in their own familiar environment.
One of the elements that makes this photo successful is that there is a simplicity to the composition...no frou frou to dress it up. The viewer just gets the subject AS IS. I like that.
I like his position and expression, particularly how it is somewhat mirrored in the portrait on the wall. I also think the green shirt that is close in color to the green chair contribute to the simplicity of the image.
On the other hand, there are a couple of elements that seem to interrupt the overall simplicity. I notice that there is what looks like a slight hot spot on the wall on the upper left...but it might be something in the scan. Do you see what I mean?
There are some distracting elements in the photo that I'd consider removing if you reshoot. All the bowls, the plant, and other things visible on the table behind your subject bother me. I realized I spent quite a bit of time trying to figure out what all that was than looking at your subject.
The salt shaker is interesting to me...simple, and seems appropriate for the setting. It doesn't distract me. I'm a little curious about that other object...looks like the upside down lid of a sugar container.
Also, TK, I'd clone out that black spot on the table. I'm OK with the long black shadow since it points right to the subject.
Overall, this one is a big success for me. For the life of me, I'd never be able to get such a natural expression. In my people shots, everyone looks like the dentist is aiming a rusty screeching drill at them. You must have a very calming manner that allows people to be themselves.