BAR has a small but active community, they also run tournaments. In terms of gameplay, it is superficially similar to Total Annihilation but much more polished. The UI and unit control mechanics are a masterpiece in their own right. A lot of what makes a strategy game "fun" is the feeling that you are actually in control of your army, and that your decisions matter. BAR delivers that better than any other strategy game, in my opinion. You can control large armies of tiny units without feeling overwhelmed by micro, and still have the option for individual-unit controls when you need them. Give it a try!