Elldee, the other thing that you probably need to take in to account is that all of us tend to only talk to those that we know. I could walk past a group of WW crew and not really even notice them too because I would not likely know them. So when you are new in BA it does and always has seemed quite a daunting environment.
Eurofleet is about the most friendly group because we know each other a little bit more but even now after 11 years I can do a briefing and not have flown with any of my crew before. When I was on WW I often went into briefings and did not know one of the fifteen crew and that was also after 11 years on that fleet.
M/F will become very friendly because it is relatively small at the momment which will be nice for you.