This is a really lovely idea...for me, I would have brought the focus onto the artist's hands and brush...not the head so much. I just think that the hands are the focal point (whether or not they're centred). I love the tones and palette of the the picture in general.
I like this photo, but the focus on the painter's hair is a bit off-putting... I probably would have liked this a little more if it had been on the hand holding the brush, or a part of the painting. :)