First I think we are going to see a Hive Chat feature that will be community specific so that there won't be the system wide dickheads to deal with. Or we will continue to lean on Discord. Can you imagine trying to have the discussions we have on PHC with the system trolls involved? No woman would be safe.
I probably should have said four. PHC, the Alliance, PAL and Hive. I spend the bulk of my time on PHC but the others also have things going that I like. Hive is where I get 'official news' and such.