I have yet to play through any of the campains. I recieed MW2 as a gift, but refused to play the campain until I got MW1. But since my machine has crapped out on me, don't see that happening any time soon.... sigh.
I've played Black Ops on split screen with a friend, and it seems like a cheapened, stripped down version of MW2. No improvements, no advanced options, just new equiptment. I love the throw-back gear; my favorite handgun of all time is the Colt .45 auto, and running around with a pair of nickle plated Colt's just Jango's my Fett They've also got the M-14, another of my favoorite weapons ever. But aside from the cool new maps and gear, I have yet to see why there's so much hype.
I got a sneak peek at the campain however, and maybe it's there; looked AWESOME!
"You set a code to live by. I won't be wronged, I won't be insulted...I won't be laid a hand on. I don't do these things to other men, and I require the same from them."