Wow... I'm not even a huge COD fan, but jeez. The only two I played were Black Ops and Modern Warfare 2, because a friend gave me his copies and said he was done with them. I played them and thought they were pretty good overall, but I didn't want to support the newer, more frequently ridiculed for being shallow, games with my money (speak with your wallet, am I right), so for MW2 I watched COD4 (in between sessions when I played MW2) and MW3 and they were very entertaining. Nothing groundbreaking by any means, but they were competent, well-made action stories that had some profound story in them, with likable characters. Black Ops was also really good; it had tons of historical allusion and atmosphere to it, with a more trippy story than I expected. So, like with the Modern Warfare series.