These images are great, you've done a great job. In the first series #1 is the standout, great colour, pose, great natural light. My only nit pick on the first and its tiny, is the vertical of the porch beam adn what might be a closeline or something going through the back of his head. You don't notice it at first, and its not a deal breaker, but its there.
#2 I'd like a bit of room above his head, I don't mind the tilt on it, it adds to the casual / relaxed feel you've captured.
#3 My eyes find it weird there is a tone change between the forground wall and background wall, other then that I don't mind it, the expression is a little mischiefous
#4 This one is the weakest of the bunch in my opinion, a bit soft, the man in the middle compostion doesn't do it any favours, or the arc through the back of the head. I think the machinary could of been used differently to make it work better. I don't mind the pose, and think even cropped off most of the RHS of the frame might help.
The other more candid not at the camera shots are great, in the 1st & 2nd you've missed a bit of the top of his head I'd prefer some space. In the last shot, its enough to look intentional so the top missing isn't a problem for me. He looks a little too posed in the 2nd. But I like the background it's got lots of potenital.
Overall I think you've done a great job, and I hope you take the CC in the way it was intended.