Ruth Pardon me if I echo your question of why we should seek a professional's opinion of our work. I consider myself a craftsman rather than an artist and am able to determine where the craftsmanship falls short on a piece. these would be the obvious mistakes. I find that they are not so obvious to a beginner. The thrill of a finished piece seems to obscure the reality of insufficient sanding or a bead that is not rolled properly and os on. There is also the close to subjective realm of what constitutes a well executed curve and the balance of form. Here we are into an evaluation of a piece as it reflects artistic values. Frankly I think some artistic values are crap, but that is a horse of a different color. An expert with vast experience is valuable in assessing how that piece fits established norms. Note that the expert in this case is not necessarily a turner, but an artistic expert. After that we are into opinion of "I like this piece" or "why on earth would anyone bother to do that" or somewhere in between. A collection of opinions along with the why of like or dislike is a valuable addition to turning education.