Here is a shot of a man with a guitar. It is done in strong side lighting (Rembrandt light) which gives it a nice mood for this shot.
I wanted to capture the concentration of the moment and at the same time, create a strong diagonal line across the photo. I purposely let the drapery in the background create a diagonal highlight that flowed parallel to the guitar neck line and complimented the highlight in the hand and pants, which then flowed back up the arm to the head, to keep the eye moving.
The light was at head level so the head and hands get most of the illumination.