Bloody beer snobs. Turn a discussion about cheap swill into their snooty, imported high-brow, boutique beers. I bet you hold your beer stein with your pinky finger and use a doily for a coaster, don't you, Nancy?
Anyway, some really good beers listed here. Personally, I love hefeweiszens. Schneider Weisse, Hacker-Pschorr are easy to find, and quite tasty. Bocks are great too. I love Schneider Aventinus - super dark, a little sweet with a clovey/cinnamon taste, and really strong - great for Thanksgiving/fall harvest time.
Almost everything from Belgium rocks hard. I've had a few that did not live up to expectations (Delerium Tremens comes to mind). Trappist beers are expensive, and overrated - but I'll usually order one if I'm in a bar that serves it since I rarely get the chance to drink them. Hoegaarden is a classic, and great in the summer. Stella is the Budweiser of Belgium - too bland, too carbonated, and tastes like corn. English Ales and Bitters are great for fall, or winter - dark, warm and flavourful. Ditto goes for any good stout.
There is so much good stuff being brewed in the US, it makes me cry that I've never tasted any of it. Quebec is a must visit for beer lovers. The microbrewers there are some of the most adventurous in North America - Unibroue is the most well known, and probably easiest to find.
I rarely drink pils, but if I do, the Czechs know their shit. Czechvar or Budvar or whatever it's called, +1. Pilsner Urquell doesn't hold a candle to it. Kozel is good too.
Around Christmas time, the booze stores here get in unique beer gift packs. Last year I bought the Traditional Scottish Ales giftpack. If you're ever interested in beer brewed with heather, moss or pine needles, keep an eye out for it. Makes a good gift for any Scot.