I dont think it was a good story, i can hardly remember it...whereas i can clearly remember the first modern warfare story.
Plus the story was over before it began! If the campaign is too short then it doesnt allow you to get to involved or care too much.
I remember set pieces and certain action parts were great in modern warfare 2. But that was about it.
A big dissapointment for me...as i found the story and immersion in the first modern warfare was great.