In that case don't think new grounds are cheating. I've been to the Britania and I've been to the Victoria Ground. I count both. I've been to Highbury, but I haven't been to the Emirates. I've been to the Arms Park (or National Stadium for some of you) but not the Mil Stad. The both would be completly new expereinces for me and both are completely new stadiums (almost). I don't think refurbished stadiums like Stamford Bridge or the Valley should count.
The 92 is a different thing altogether, as IMO if you went to Fellows Park back in the 80s you'd have Wallsall under your belt. But if you went to Plough Lane in the 80s would you have AFC Wimbledon, MK Dons or neither? I say neither.