They are not too bad at all. In pose #1 , his hands are not posed well at all. It would have been a bit better if his head was tilted a bit away from his lead shoulder. The background is too dark. A medium grey would have worked well.
Pose #2 ... Good, except for his front hand looking too big. Crop it off and it would work well.
Pose #3 The background is out of key, with his jacket. A pastel, or mid-range bckgrd. would have been better. There is a lack of light in one eye. And the shirt is wrinkled.
Pose #4 Again, lack of light in one eye and the shirt is wrinkled.
It's a nice series for what he wanted.