We usually have a keg of homebrewed nut brown or porter on hand for gatherings... we also like a good Scottish 80/- beer too.
If I'm buying beer - it's usually a local brewed beverage - Atlanta Brewing and Sweetwater Brewing have some nice offerings. I do look forward to this time of the year when Sam Adams brings out Oktoberfest for a while - it's a nice marzen.
I'll third, fourth or whatever on Young's DCS - it's best on tap.
I used to be a big Guinness fan, but since making my own stout for years, Guinness seems to not have as much body.
The mega beers and lite beers are training wheels... if I can't have real beer, I'll take water.
England has some great beers. Was in Manchester in the spring for a football game(soccer) and drank nothing but local brews, some great stuff. Joseph Holt was the best, also Unicorn and Bear *** were some great ones. Also Boddingtons tasted much better on draught over there. Also the hard ciders were good and very hard, some were 8% Strongbow is what is was and you can get it here in the states but its not as strong but is very good if you like hard cider.