Mark, I can definately relate to what you describe as personality changes when eating/drinking certain things. You're right, it isn't fun, especially when you try so hard. Hang in there, it sounds like you're on the right track. Trust what your body is telling you. I think it sounds like you're doing great.
Thanks for checking into it Dr. O, it is something I have been curious/wondering about. Maybe you and Dogtor J. should do a study!