Interesting lighting and pose, lots of tones; noisy background and the button or snap or whatever on the shirt (left side of pic) is bright and distracting.
A great combination of sound photographic concepts; composition, light, form, exposure, texture, depth of field. All put together in a classic style with a touch of nuance to top it off. I bet that you and the model are both very happy with this image. Good luck in the challenge.