>Socially, it's also highly irritating to be around. Since most Vegans are converts to the life-style, it's like any other recent convert to a chosen life-style (religion, fitness, chosen computer platform, etc.), endlessly inserting it into every conversation and constant moral chastisement to self-justify the difficulties of their chosen life-style to those that honestly don't care in the least and have better things to do with their time.
It's more complex than that.
Every time I sit down to eat in a social situation, everyone around me is fishing for small talk to make. So, they comment what I order, and want to hear all about it. Since I've had this conversation a thousand times before (at least), I'm sick of it, but also well versed in any responding to anything they say.
It's also stressful, because many times I've had to play this game, people will say patently offensive things - sometimes obliviously so, and sometimes because they genuine assholes. Either way, it slowly sticks to your psyche
So, I'm making small talk, on a topic, which makes me feel bad, that bored me to tears long, long ago, and has marked me as a permanent outsider in more than one situation. And this is while my erstwhile friends sit around chewing on a steaming piece of something that I could have easily made friends with too.
So, I'm not at my best.