I am in all (3). The airheads are very useful for finding out arcane technical details of our bikes, and they are very friendly, if sometimes rather odd-looking at the rallies. I've been a BMWMOA member for many years - I think it is mostly the history of that which keeps me signing up. There are still aspects of the MOA which I like, including the forum, the anonymous book, etc. but it has been becoming more mainstream/slick these days, and not all the changes are to my taste. The BMWRA was more of a holdout for the older bikes (airheads), but even they have made some substantial changes and modernizations. I've been an BMWRA member for the shortest time, but I've enjoyed myself quite a bit at several of their gatherings, and they do tend to be less pretentious than some other organizations. But, no one is perfect.