I think you are underestimating the role preference plays in preferences. We get it that you like wine mostly for the buzz, but it so happens that when people like it mainly for other aspects, they are not always faking it, and neither are they always posturing. When my wife and I enjoy a glass of wine at home, no-one else knows.
I think you are misunderstanding what I am getting at. It's like music... some genres of music are pretty unlikely that an individual would like except for the culture that surrounds them and promotes them. And yet, sure, those people that do like them, after being exposed to that culture, still probably listen to that music when no one is watching. I'm not suggesting that most people are consciously trying to impress people.
