I'm a particular fan of the Fullers Brewery in England. Their London Pride and 1845 ales, and their London Porter, are the best I've ever tasted, and the rest of their line-up is excellent too (except their organic honey ale, but in my expirience those always suck).
In general, English and Belgian beer is good, but Miller's is nice on a hot summer day.
The "Gudeløs"("godless") beer from a small danish micro brewery is a favorite amongst Imperial Stouts too, though I may be a bit biased due to the message.