I guess I may be looking at this question a little differently than others, I understand that the players and the GM are the most important part of making the actual game expereince, and in that respect I guess I have moderate expectations and they usually meet those expectations - some are better, some are worse. But when I answered the poll, I was looking more from the idea of whether a game; a new game, a new system whatever, lived up to my high expectations once we got around to trying that out. In that situation things often were not as good as my expectations.
Once upon a time, when I was single, no kids, no mortgage and had disposable income, I would buy all kinds of new games and systems. I inevitably would read all the info, would get very excited for the game, finally convince some friends to try it out, and then find that after a few times, the game kind of fell flat. Maybe it was just we didn't have the right people, sometimes it was a lack of support from the publisher, many times it was a situation where it sounded cool, but in practicality, it just didn't work well. For me D&D is the one game that has held on through thick and thin, from OD&D all the way to 3.5. I'm not saying it is perfect, but somehow it has always managed to hold on to the mystique while playing well and being supported (expect for that one very dark period just before WoTC).