Much better than the ones posted last week. Not nearly as soft, so that's a great improvement. Lighting appears to still be off. I'm not expert and basically just getting into studio l ighting myself, but in the first two there are some pretty harsh shadows and harsh lighting in general, and some pretty intense shadows.
In first and second images, looks like most of the lighting fell onto their right arms, making contributing to the flat look of them.
Third image i like although his face is blown out a bit.
What type of lighting are you using. Is any of it diffused.
Okay, now when i post my first studio sets you can lash out at me. HAHA
Seriously, though much more improved over last week IMHO.
Third image looks good.. good poste