Don't get me wrong, I own the game and enjoy playing it from time to time, but playing the storyline just gets stale. In every city it was just pit-pocket this guy, listen to this guy, help this guy, then after doing enough of those, kill this guy. While I thought the story and the gameplay were fantastic (I pop it in my xbox from time to time just to run around rooftops and cause a ruckus) and some of the achievements were fun, the actual missions were extremely repetitive.
That being said, I'll probably still buy the sequel
But anyways, yeah COD5.