Dublin are the only team who are given that 'they expect to win' mantle whenever they play. This means if we do win we can only be credited with achieving the status quo and if we lose, we can be mocked over it as we lost 'expecting to win'.
Dublin got big crowds when we were poor enough (also for the record, Dublin crowds didn't begin in '74, there were big Dublin followings in '58 and '63) and there is a very large core support there. Of course there are the event junkies, but other counties have them too, in most cases it is playing Dublin that brings out the event junkies from other teams.
But the whole thing has gone a bit OTT tribal. Personally I have a lot more in common with a Kerry or Tyrone footballer supporter then most other sub sections of society, and if I was to pick a 'tribe' it would be something along those lines. But once things reach a level of popularity now, it gets the X Factor type treatment from the media, but also from the general public. There has to be a back story, there has to be heroes and there has to be villains etc. But actually, there doesn't - there just has to be football.