I love this thread, lots of usefull tips and ideas here 
I´m working on a 3d womans portrait at the moment, my first serious attempt to create a 3d beauty and it is really challenging. I think I have to practice the female forms for years before I can create a real beauty in 3d.Most of the time I´ve modelled monster,animals or men, but a woman is a whole different field.
I want the woman to be young and beautyfull and a colorsheme/lighting/composition that translate a kind of meditative/pretty dark (though not too dark) mood. I want a lot of emotion coming from the eyes. I have some problems with the skinshading, maybe the look is too smooth now due to the lack of texture/color variation in the skin.
I would really appreciate some suggestions from one of the best digital female creators out there :) ;)
-Grugi