Out of all the breweries I have purchased and consumed beer from I can easily say that my favorite is Sierra Nevada. I say this for a number of reasons. 1.) There beers are great. I have never had anything from them that I didn't enjoy. Some were better than others, but none were duds. 2.) They make a good representation of my favorite styles (their Czech Pils, DIPA, Maibock, Porter, and Dubbel and Imperial Stout- in the form of Fritz and Ken, are/were all outstanding!) 3.) They care about the craft community in general. Yeah, they are a huge business in terms of craft, but they haven't lost touch with their roots, which is not only about making good beer, but doing what's right by the community as well. 4.) They have a great track record of being environmentally friendly. 5.) They are available almost everywhere in the US. Honorable mention is Jack's Abby. I don't know much about them, but I do know everything I have had from them is amazing.