My concern here is the sweeping judgments that are being made about people in general, most of whom are strangers. Different parishes do indeed have different cultures, just as other societies.
[snip]
I myself am quite the extrovert, and if I met you and your family after Mass, in the parish hall, in front of the church, in the parking lot, etc., I would warmly welcome you and speak with you. However, at the peace, I am one of those more prayerful people who prefer a nod to a handshake. That doesn’t make me cold or judgmental, and certainly nothing to leave Mass over.
I do want to address this point, not to change the topic but because as I kept reading this thread, I started thinking of things like differences in personality and perceptions thereof (especially because this sort of thing has been one of my personal interests). Different parishes have different cultures, and different people have different personalities.
I rarely quote whole posts, even without a forum policy that tends to discourage doing so

, but here I was tempted.
And I rarely say “I could’ve written this post” (not counting things like writing a post in my own voice), but here, too, I’m tempted.
The only substantial difference that comes to my mind is that I’m an introvert by several common definitions, but my behavior in that paragraph, at least as I read it, actually wouldn’t be that dissimilar. I’ll shake your hand at the Peace, though I’d probably prefer a nod or certain other forms. Yes, I can talk to you in the parking lot–I’ve done that in parking lots where I’ve actually been!

(I do not believe, and neither do you seem to believe, that “extroverts” and “introverts” are two vastly different camps, with little possibility of similarity.

)
But I’m reminded of something from a long time ago.
Someone mentioned to me that someone else considered me “arrogant” when I actually wasn’t. This Someone never identified the other person, I didn’t prod her for clues to the other person’s identity, and therefore I never spoke to that Someone Else about the matter, and therefore I never found out exactly why. Years later, I was some doing reading and found out about a common misinterpretation of introversion as “arrogance.” I can’t make this match with too much certainty, but I knew at least that I wasn’t actually being arrogant.
(I wasn’t particularly hurt. I did find it ironic that labeling me without even bothering to learn more about me can be considered “arrogant” in turn. And if someone was actually gossiping about me–“wow, that Granum Frumenti sure is arrogant, don’t you agree?”–that act isn’t very “warm” or “friendly.”)
Now, I don’t presume to say that what people have described in this thread (I don’t mean the original post) is simply a misinterpretation of introversion. All the same, from reading elsewhere, I’ve heard of introverts suggesting that some other people expect everyone to be sociable on their own terms and wouldn’t understand (or even try to understand) people like me. I’d hate for people to think that people who aren’t stereotypical extroverts are somehow bad, wrong, or otherwise defective. I also suggest that sometimes maybe not everything is as it may first appear.
P.S. I’ve just spent a little time looking for discussions of introversion on this forum. There are quite a few. For some reason, I’d never looked before, though I’ve looked for and read discussions on “temperament.”