Wow Rex , this speaks so true to me especially when referring to the process. I look forward to Part III.
I am very new in the screenwriting scene and have a partner which adds a little twist to the whole thing. I agree with Phyllis on how we react to criticism I have already experienced it from agents, family, producers and friends. However, I try to write from my heart and present what I am passionately trying to say. This serves as a sort of shield/sifter for me and allows me to accept the constructive criticism and pick out the recommendations that ring true. This way I don't take it personally, because if I do, I find my finger hovering over the DELETE button and that's just plain writers suicide.
By the way I have a great screenwriting book which references "Sideways" . Thanks again for sharing.