I was at New Glarus, but it was before they built the new brewery.
I guess we're talking about regional or production size breweries, because I wouldn't be able to remember all the brewpubs I've been to.
My two favorites have been New Belgium and Anchor. Others I have been to are Rogue in Newport, Yuengling in Tampa, Brooklyn in Brooklyn, Lone Star (they had a fins, feathers and horn museum that was totally wacky), Coors a long long time ago, Cigar City (but it's in my neighborhood), Surly, and most likely several others that skip my mind right now.