Good thread...here's a few things I didn't buy into:
Shunning of family members, and shunning overall. I never bothered shunning anybody.
The blood doctrine. Ideally, yes, I can see not using blood, but in an emergency I can't see dying over it or letting a child die over it.
The interpretations of Revelation prophecies as applying to Conventions and Watchtower articles.
The age of major life forms on earth, especially prehistorically in regard to dinosaurs.