Let's see...I've been playing Earthbound again (hence the profile pic). We picked up Mario Kart 8 this weekend when we had friends over, and had some great 4-player going. The next day, I turned on the WiiU to play Mario Kart 8. Played for a while, switched to Earthbound to get a break. That was two days ago, and Earthbound is all I've played since. I had downloaded it to show support when Nintendo finally added it to the eShop, but hadn't gotten a chance to play the WiiU version yet. And since it is probably my favorite video game ever, I'll probably finish it before moving back to other things. I used to play it at least yearly, so I was due for a replay.
Besides that, I picked up Battleblock Theater on Steam when it released and have been playing that a bit with some friends online. The Behemoth remains one of my favorite development companies, and Battleblock gets all the fun of the old PDA games on Alien Hominid HD, but with online play as well. Great times!