Boards
Deciding to never see a band live ever again
not because they were bad, but because you know seeing them again wouldn't be as good as when you last saw them.
Bloc Party at Birthdays last week definitely. Absolutely crazy show, seeing them in a hangar like Earls Court would be so disappointing after seeing them at such a tiny venue. That said, if they did a Don't Look Back show where they played Silent Alarm I'd have to go obviously.