Quite the wooden face, sepia is appropriate.

she has rather sad eyes in this,and fits the starkness of the colour

This bluish colour was used in old days by a famous Swedish photographer. I think it is an appropriate monotone for it stimulates and the excitement shown in the character marries well with blue. I love the expression caught and that says so much about the relationship betweeen photographer and subject and as far as relationship between me (the viewer) and subject, well, it makes me want to know him for I know he is a fun and fine gentleman. Your capture is well done with sharpness shown and good exposure especially on the white shirt, keeping the piano there adds to the story of fun fun fun. A bit of mystery also as I have no idea what he is holding...........and that is a good thing.

Some serious bling there. Nice image and I particularly like the tone you chose for this...it is gently hued yet the jewel shines through. Good framing. Would be nice if that center stone was sharper, overall well done.