Unfortunately, it's super common. When it comes to my family, they stopped rubbing my face in it once I stood up for myself, which is nice. I had to publicly call out my brother for behaving towards me the way he imagines vegans do before he fully stopped. I have friends who I enjoy the company of, I play board games and tabletop RPGs with them. If I'm round at their place and they're cooking, sometimes they go into a tirade about how being a vegan is terrible and I have to politely ask them to stop because I'm there to enjoy their company, not defend my eating practices.

It's thankfully gotten less common, but I honestly think that the whole "angry vegan" stereotype caused them to get on the offensive immediately, expecting a big verbal showdown. I think it's also this perception of "you think you're better than me, huh?".

Now that people know what to expect, sometimes they have questions about why not dairy, or why not eggs. I'm happy to answer those questions, but I've never gone into the topic of my own accord.