Larry, I'm glad you mentioned the April 2000 Artist Choice weekends. After reading the original post, I was thinking of the September 2000 Artist Choice weekends, but wasn't sure if those would have been considered "pin events" in the same way as the more recent ones.
Like you said about the April weekends, the September AC weekends were "simple yet fun." No event fees, no auctions, no 50 million pins to drain the bank account. Just two pins each weekend, artist signings, and trading with fellow collectors.
Of the more recent events, it's a wash with most of them. Most of them had great theming -- Big Pin Game, Star Spangled Pin Event, etc -- but they all had something against them as well. Lauri complained about being forced to stand in the heat at the BPG to the point of almost passing out, some of the open edition pins at the SSPE sold out, and we were bounced from the World Showplace in Epcot last year.
Maybe Disney needs to learn from its past and take a back to basics approach with the pin events and design them for the pin traders instead of to improve their profit margin.