I will do the opposite and tell you who was always nice. Maybe the others had a bad day or whatever. If I doesn't mention someone, that doesn't mean he or she was unpleasant. Maybe I just never spoke to them.
On a sidenote, I'm not some fanboy who didn't get a picture or whatever and is now butthurt. I saw most of them drunk and sober and talked about normal things not just CS.
Was always a pleasure with: Metuz, HenryG, SPUNJ, Moses, YNk and Anders. To answer your question a bit, no, mostly people who do not have very popular roles :)