That's some good progress in those portraits jengy. I think your portraits might benefit from some real life pencils or charcoal next to add more character to them.
Thanks for all the positive, constructive and kind words everyone.
Even though I don't currently have any new studies to show, I feel like I should respond to what has been written so far before the backlog of text becomes too long and before there'll be too much stuff to respond to.
Thank you jengy for putting in the time to prepare that summary of some of the techniques presented in Betty Edwards' book (I hope you didn't specifically prepare those only for me though, because I already worked with that book back in 2001/2002, so that would have been a waste of your time. Still a useful picture for everyone trying to improve their life studies). It's really a good book and I think I've recommended it to others myself a few times over the years. I even keep meaning to read it again.

Personally I'm not a friend of the grid and never used it because I want to train my eyes/mind to be able to do stuff mostly without additional tools. Also, I'm too lazy to build a good physical grid, heh.
Cyangmou is right that simply "copying from life", trying to be a human camera, isn't enough and he's also right in that this is not where my main focus is on right now.
My current goal is to be able to construct any pose/angle from scratch with believable anatomy and volumes in a somewhat realistic appearance and without relying on any references (imagine being stuck on a lonely island where you have to invent & draw your own new friends from imagination to stay sane).
I see how I'm hitting a road block here again though, because I don't know enough about how the human features look from all angles yet and which basic volumes they're best constructed from, so life studies as recommended by Ryumaru and jengy are very important indeed and I should really do them more often.
That mental library of things which Ryumaru mentioned, combined with the constructive approach by Loomis, an understanding of volume and maybe even using photo references and being an observant creeper in real life (without copying 1:1) for getting features right should eventually end up giving the best results.
To make this post worthwile, I'll post some real life studies I made in the past over the years (in fact, I do these so rarely (because I find inventing more interesting than copying), those are all I could find) (anything pre 2002 I never got around to scanning it and I don't even know which box or drawer it's currently hidden in)).
2002 seems to have been a productive period. Then there's a long stretch of nothing until a single drawing from 2007, following by more nothing until two drawings from 2009, followed by nothing again until now 2012.
Another goal of mine is to first get back to and then surpass my skill level as it was 10 years ago.
2002:








2007:
2009:

