Here's a recent portrait study using the usual limited palette. In this particular study I attempted to get the values more accurate at least as they appeared on the photograph. The eyes presented the biggest challenge due to the 3/4 angle of the head and the somewhat serious expression in them. It is rather difficult to get a correct look in the eyes at this angle since it's very easy to give them a cross eyed look, or to give the impression that the space between them is wrong. Although there are still some things in it that might be improved, it didn't turn out too bad overall for a portrait study. Any constructive criticisms are always welcome.