I love the lighting. It preserves all of the mood and feel of the Dutch Masters.
The colors, by and large, are very muted. Generally this makes a portrait like this without a point of interest. However, here you skillfully over come this by showing your subject with a red scarf. That red scarf grabs the viewer and does not let them go.
As a matter of taste, I would have preferred the eye not to be obscured by the shadow. I find that the eyes in a portrait are the most important part and hiding both of them leaves this portrait a bit cold.
This portrait shows a good mastery of light and how it relates to mood as well as your skill in making an image interesting to look at.