While I agree that a full stadium is best, Maine Road was hardly ever full pre 1994. It's capacity for most of the 70s and 80s was in excess of 50,000 but averages were as low as 21,922 at times. We often talk about the great atmosphere at games such as Huddersfield 10-1 but that attracted 19,583 - less than half capacity. The 1986 Manchester derby was watched by only 32,440 (it was on telly) in a 52,600 capacity stadium and no one ever claimed that atmosphere was poor at the time. So what I'm saying is if crowds less than half the capacity at Maine Road could make a great atmosphere then much larger crowds in the Etihad should be better. It's not the number of people or visibility of empty seats that's the issue it's the ability/willingness of people to make noise.