The absolute best beer I ever had, by far, was an ice cold something-or-other in a bottle (I don't even recall what it was, maybe a Mich light or ultra, and I'm sure it wouldn't have mattered) after the long, hot trek out of the Aravaipa Canyon Wilderness following a weekend backpack trip.
Other than that, I spent almost a year working in the UK as a contractor for Det 4 of the 9th SRW at RAF Mildenhall, and did a lot of pub hopping in my spare time. I got spoiled. Pretty much any fresh cask ale over there is awesome. A couple of my favorites: Ind Coope Burton Ale and Adnams Southwold Bitter. Greene King had a good IPA and a Bitter as well.
I don't drink anymore. I don't drink any less either. Lindemans Grand Cuvée Rene was one I still remember from my culinary school days. Nowadays I drink a little of everything. Pilsner Urquell, Sam Adams, Moose Drool, Blown Out Brown, Sessions IPA.
Current favourites are Hoyne Brewing (Victoria, BC) Pilsner and their "Dark Matter", Yukon Brewing "Bonanza Brown" and Alaska's "Amber Ale". Not a huge fan of the current trend to hop the shit out of beers.
Well, I lived my entire life in England (specifically Yorkshire. Home of beer), up until 8 years ago, so I may be a little biased here....but it's a 50/50/50 split between Black Sheep, Theakston's XB & Taylor's Landlord.