Mplayer was probably one of the best multiplayer gaming communities I have ever used. This is back in the days of quake and the original team fortress which was developed for quake.

The gaming community was robust and you actually got to know each other because it also had that avatar chat side to it and you could play multiple games. Guess I still prefer it over steam.

When I played on mplayer, the community felt more like an mmorpg, instead of just a multiplayer game launcher like steam.