C&C per req:
1. By definition, a head shot should be of the head, and include the whole head. I think a portrait orientation would have allowed you to do that. Why did you opt for horizontal/landscape compositions? The lightings seems slightly hot on the face, and, as mentioned, the focus appears slightly soft.
2. Definitely too hot in the face; probably 2/3 of a stop, and again, not sure about the landscape composition. I would suggest trying a different lighting set-up; say key 30 degrees camera right, with your largest SB aimed just slightly down, and a refelctor opposite and low, aimed up.
Just my $00.02 worth - your mileage may vary.
~John