looking good Bish. The only areas that are weak are the hands and feet, I would not concentrate on these so much though as it can take half the best part of a day to get these areas good and so it may be best to keep working on form and go for a more speed sculpt approach. As you said earlier these are not ideal for rigging and so it may not be worth investing to much time into getting them 100% as I know your main aim is to create characters that can be rigged and used for animation further down the line. Might be worth making a hand or foot sculpt at some point though and be good practice, they are damn tough to nail.

Keep up the great work and motivation matey is always good to see you pushing ahead.