To me most wargaming cons are a lot like markets, mostly stands selling very tempting goods and maybe a Christmas tree or something for show. Plus people giving demo's of things they are trying to sell you. Mind you I do enjoy this, but note how many people already feel the pain in their wallets even before a con has started.
Poldercon on the other hand, feels like a highlight reel of wargaming club days. You know how every now and again a member has a great idea for a participation game and then actually delivers? This was like you took those rare occasions and combined them into a single day, a room filled with 20 games you all desperately want to play on beautiful tables ran by friendly witty and capable people who want to show you a fun game, but have little interest in actually selling it.