I've been playing GW2. This game is really good. They've spruced up the mmo format in such a way that everyone has to work together. It makes the game a lot more fun.
There's area events which are constantly popping up, and everyone in the area, goes running off to them and you work together to take down bosses, guard a caravan, defend a fort, or attack a fort. You get extra XP for it, Guild influence (if you're in a guild. Influence is used to build things for your guild, let it be a bank, a weaponsmith or a catapult to be used at a fort during WvW) and it's a lot of fun.
World vs World is similar, but it pits different servers against each other. You've got a really big map, like, a continent, and your server tries to control as many forts, supply stations, scouts and supply caravans. So, in order to do that you try to take the other servers' forts, keeps, supply stations, caravans, etc, etc. Which isn't easy. Because these forts and keeps have catapults, trebuchets, burning oil, etc, etc. Last night, a few of us went on to WvW and snuck into the heart of a server's territory. We took out a couple of supply caravans (which you need, because you need those supplies to build all your catapults and trebuchets) got event XP and influence for it and then took out a supply station until we were spotted. Then we had to run away, 'cos we had ten dudes come after us. Then we joined up with a big group and tried to take a fort. That didn't end up so well.
Because everyone has to work together in this game, people take the time to try to res you, which is a nice touch. A lot of this is due to the fact that people can't steal your drops if they help you kill a mob. You both end up getting a drop. It creates a sense of community.
So yeah, that's what I've been playing. It's a hoot. Best MMO I've ever played.