Papillon1

I think you should change your sign-on to "WiseAboutMe" because I think your post so shows this. If you haven't, stop beating up yourself for not speaking up to your MD. We all have our times too.
Only if comfortable to you, a suggested dialogue for your next visit could be the essence of your own words above with a little reframing: "Dr., I am interested in pursuing the lapband option. I value that you are a very good surgeon and I understood the other options you discussed, however I have decided on the lap band. I know you favor the others procedures, however our last visit disappointed and depressed me to the point of tears. So I believe you can understand my need to now know that you support and respect my choices before moving forward together on something so important to my life."
To thy own self be true...best for your next appointment!