I've been having a blast playing World at War with a couple of friends of mine, brings back some good memories I had playing it when it first came out.
I stick with a lot of the COD games. I have every game in the series. I didn't play WAW when it came out and didn't buy the map packs so it is REALLY hard to get into a game haha. Back on topic I mainly play mw1-3 and some halo every now and then.