Playing Call of Duty Modern Warfare 2 again.
Besides the Half-Life series that is the best First person shooter game I have ever played and the best of the Call of Duty series IMO, (although Modern Warfare is a close second).
I play it on the PC with mouse and keyboard controls, (old school style), and I am
still trying to complete all the solo missions on veteran, (just two to go!). If you haven't completed the game itself on veteran you have to give it a try, it is fun as hell, (although I was stuck trying to escape the mansion with the DRM for about a week or so). My only major complaint about the game is that when you get hit your visibility goes down to almost zero and it is hard to see your opponent or where you are going, (realistic maybe but frustrating).
COD Black Ops has better graphics, (you can even see them sweat!), but I hope Modern Warfare 3 is more like its' predecessor because the tempo of that game was very slow because of the storyline inserts, (kills the replay value if you ask me).