The first thing is that I'm not entirely at my best in crowds or even small groups. So when the numbers start growing I feel pretty out of place. But secondly, I don't have the thickest skin and one of the things that gets through that skin the fastest is people not listening, talking down to me, and treating me like I don't know what I'm talking about. And I find that happens quite a bit in comic stores, I could probably find at least a few people who feel I've done it to them. So I guess I deserve it but that doesn't make me feel any better when it happens to me.
So yeah, a nice visit ends up with me grumbling to myself on the way home. Did I mention that I tend to hold a grudge with that thin skin of mine?