Having played from 2.0-present, I say the long wait between 3.0 and 3.1, and then 3.1 itself. Lord of Verminion sounded cool, but we should've known nobody would do it. And diadem was crap. And....that's mainly all we got after almost half a year. Sure, Thordan Ex was a cool fight, but I have never seen any period of the game cause as much burnout, and sub cancels. It crippled my FC, forcing us to another, and I believe it was also around the time the EU data centre / free transfer was introduced, making our server even more dead since all the hardcore players want to converge on one place (pre cross world). Absolute travesty.