yes mentler they are definetely helpful..since you know so much about the construction of the figure..
does your female bodies are that way or do you idealize?? hehe..also i would love to see more male bodies...where the anatomy is more obvious than females
I don't want to sound rude or anything, I just want to point out that I see some issues with perspective and proportion in your works. While it's up to you to change (and emphasize) certain parts of the body by playing with proportions there are rules which are not to be broken. Take the last portrait for example. The sitter's left eye sits too low to be drawn in correct perspective. Also the anatomy of the hand seems wrong. Lastly it is clearly visible that you changed the proportions of the face quite a lot, it would be interesting to see you try to really nail the proportions and the likeness of the sitter. You could also mind your values a bit more, since they don't seem to follow a working system at the moment. Again, I don't want to sound rude, just some thoughts. Hope it helps.