I said you are, even if I can only speak about written conversations. I mean, I don't even understand why someone would say you're not, it has never crossed my mind that you had the slightest issue with it.
I think if someone really has problems at conversations, it could either be explained by some sort of anxiety disorder, perhaps some speech disorder if the issue is in the form rather than the content, or it would show in written conversations in some way as well. Like, if the content of what you say is so bad, it would be bad on SF too. Obviously your content has no issues whatsoever.

So many people like your posts! :p