What portrait posing rules could you recommend for studio photography?
How to pose (and not to) the head, body, hands, wrists, waist, hips, legs?
In what categories can the models can be divided into, and what is good and bad for each category?
There are some different styles, and a variety of poses, but for classic portraiture, it's all about the face. Posing the body helps the overall composition and visual interest, but if you forget all else, make sure the face, and particularly the eyes are captured well.
Dare to cut! E.g. a face may gain dynamism if you cut off the top of the head and one of the ears. (not if done with a knife! :-))
Also a slightly slanted camera position looks more dynamic. Not recommended if you have some form of horizon in your picture, though.
Create a sense of movement in your photograph. Direct your subject to shift their weight back and forth from one foot to the other.
Most people are uncomfortable in front of the camera (no kidding?). They’ll loosen up if you give them direction. Give them feedback and interact while taking pictures. The interaction will show in your photographs.
The BEST Portraits are historically shot a couple of degrees above the subjects eyeline, but like all things break the rules and shoot from various angles too.
All of the above.
Early on in the session, I try to find the best angle for the model. So, I start on one side and move around the person while I shoot. Review the results. There will be a a few good angles that I will use for increased attention. Some look better when shot 3/4 right and some who look better from the left.
Talent who are at ease and who are told how really "good" they look, will look great, by the way.