Every time I've jumped in with GAF it has been good times. The games that get support are kind of random though. TF2 was consistent for years (probably still is), Chivalry seems on and off, and oddly enough Battlefield 3 and Kid Icarus were about the same, a very small group meeting weekly.This thread really makes me want to get involved in the various GAF communities. Pretty much all my friends aren't gamers or are very casual so any game that thrives with a solid community I've avoided over the years. Seems like this is a great place to find like minded gamers playing a huge variety of games.
Around the time the original Love went down getting into Phantom Dust one last time is something I'll always cherish.
Halo GAF seems huge, never jumped in with them.