Ever since I saw this:
I started playing through every Metal Gear game again, I'm about halfway through Snake Eater now. I haven't played it since it first came out on PS2, so I'm still getting used to the moveable camera.
Other than that, I've been on a fighting game binge. Recently picked up an arcade stick for PS3 just for Virtua Fighter 5: Final Showdown, but decided having only one fighting game wasn't enough. So, I went out and picked up SSF4: Arcade, Soul Calibur V, Street Fighter X Tekken, and BlazBlue.
It turns out, I suck at Street Fighter, SFXT is too easy, I don't really like Soul Calibur much anymore, and BlazBlue is pretty cool, but I still like Guilty Gear more.