Ok here's another head ( a cropped in version of an uncompleted image).
Took a completely different approach today - worked in a way I've never worked before.
Partly from looking at zhu zhu's work and wip stills, partly from an inspiring conversation I had with my girlfriend today. I wanted to be more analytical and observe more closely while working. So I consciously painted with hard edged brush no pressure sensitivity. And i painted dabs. Blending with a couple texture brushes after.
I learned lots and even though it's not as good a likeness as I'd like i really enjoyed the process and am pleased with the result at this point.
Might continue with it tomorrow, or later in the week, though if i keep getting more and more detailed, I'll never get through 50 in a month :P

Ok so there's an anatomy challenge on cgtalk at the moment.
Rebecca Kimmel, one of the greatest moderators known to man, is running a challenge to draw a whopping 50 heads in one month. All from master works!
Should be fantastic learning. Though it is almost two a day! SHEESH!
Well i did the first one today.
If you wanna see the thread heres the URL: http://forums.cgsociety.org/showthread.php?t=375031&page=1&pp=15
here's my first, from ref Image #047
DAVID d'Angers Sorrow 1811 Plaster, height 55 cm Private collection

Still sketching girlies, though now im trying to make up a woman :)
heres some eye studies i did. Basically skintone experiments for a start...
Again done using a fantastic tutorial from Enayla.