when talking on positions, it all depends on the subject, most ppl look good with a 45degree profile shot, sometimes siting high, siting on a stool. when the subject is standing sometimes the problem is in the arms, it can disable the whole posture. what excactly are you looking for? male, female. the best is experimenting for yourself so you can get an idea on what posture looks good with what subject. something very important make your subject relax the subject is pretty big to have a definitive answer