FF XIV, and hopefully catch up on some sleep.
I finished the main storyline, have run multiple high-level (50) dungeons, started beast tribe quests, polished off the Archer hunting log (and am most of the way through Maelstrom), advanced to the highest GC ranking, unlocked most of the Hard mode dungeons, and got through the first 6 steps of my relic weapon quest. That's a pretty damn productive weekend.
I have to be honest, I'm not sure I've ever been as addicted to a game as I am to FF XIV. I typically just lose interest once I hit endgame MMO content, but I haven't had even the slightest pull to quit playing. Quite the opposite...I find that I'm actually becoming more
interested the further I get into the endgame stuff. I'd love it if FF XIV followed the FF XI route and added a whole truckload of expansions over the next few years.