Shouldn’t the poll have read “Which of these topics do you least dislike reading threads about?”
I voted for cellar construction. Many of us have built wine cellars and it is very exciting for us. I am more than happy to read about others doing so and answering any questions someone might have (general answer, build bigger). On the contrary, debates about which of the many types of perfectly adequate stemware is best are just a step too far - x spent a fortune of Riedel Sommielier glasses but threw them all away because he now can only drink his wines from Zalto.