#1 Nice pose and framing, but we are losing definition in the shadows. A back light would help with that.
#2 Not too crazy about the pose, but there is definition along her face because of the dark background.
#3 Very good, including your choice of horizontal format with this pose.
#4 In this shot, your model's pose is very good, but the frame seems forced to the right, giving your subject less "space" for his face.
#5 The frame is better here, but your model's pose does him no favors. He is turned too far sideways.
#6 Pose is good, and makes the dark glasses o.k.
#7 Her posture is good, but I wish you would have asked her to look sideways at the camera. Framing and lighting are good.
#8 Pose not great, and the shadows on her left side are too much.
You seem to be trying to use only one light, but perhaps a reflector opposite the flash would have given just a little bit more light on the left sides of the models.