I have to jump on the Sierra Nevada band wagon. They make a variety of good tasting beer. I like the Pale Ale, Torpedo IPA, Ruthless Rye, Hoptimum, Hop Hunter... They make a good Porter and Coffee Stout too. My good friend (Coors Light addict) even likes their Summerfest Lager! So many beers, so little time. These beers are higher ABV than your average Bud Light, Miller, Coors, so I try to keep it to one or two at a time. Very flavorful, so they are a treat that way.
I also like trying other small brewery beers too. On a recent trip to San Diego, we went to Ballast Point, Stone and Coronado Brewing companies. We would get a flight of five or six types of beer so we could taste as many as possible. Also went on the Taylor Guitar Factory tour, but that's another story.