Real life stuff has been cutting into may valuable sketchbook browsing time.
You sir are like me, a draftsman at heart. I think in terms of lines instead of color/values. I have a difficult time painting as well because it is the exact opposite of what I usually do.
I don't have a sketchbook because I don't have a scanner, I'm not very good with digital art, and i'm terribly intimidated. :/
The side profile is very nice, as is the nude. As you have already pointed out yourself, I would like to see some deepening of the values maybe. I think they could both benefit from some heaver shadows.
Do you go to school for art or is it a hobby of yours? I'm always interested to hear about people get started.
Talk to you later!
"A perfect machine can be made from imperfect parts."