Sam Adams has many very good beers. And there's nothing really wrong with Bud/Miller/Coors, but they're very... meh, really. Not bad, just a bit boring to me, although they do make a solid hit at times. Budweiser Black Crown, for example.
But in general I'm more of a cider and whiskey kind of guy, with beer more of an occasional thing.
And definitely second/third/fourth-ing a request for word on any official plans for any kind of GenCon mixer.