Yeah...the "warm" thing is hard for me, somehow. I can do it in business situations, but when I'm first meeting people socially, I'm hesitant to be overly friendly at random. Now that I think about it, I think part of the reason is that I'm afraid of getting trapped in awkward conversations. Rather than initiate an interaction by greeting someone, it's easier to wait until spoken to, or until a conversation starts up between other people and I can just join in.

Huh. I hadn't previously realized it was a particular kind of social phobia, and not just social phobia in general, that was behind that. Cool, more brain data.