I am one of those people who is judging this based on the campaign alone. The online is good as always. The story modes in the MW series have always been interesting, and the backdrops are breathtaking. Some of the scenes with the the US Marines and Army are really cool, and the whole nuclear war, conspiracy theory thing is enough to make you think. While this campaign was a bit longer than MW2's, it still felt kinda short (I probably beat it in around 13 hours).It also isn't the great ending and climax that one may want. There are also the same old endless waves of enemies, who will completely disregard their own safety to try and kill you. But overall, its a great ride, and if they made it into a movie it would be amazing (as well as cost near a billion dollars)...
Review of Call of Duty: Modern Warfare 3
