Guinness draft on nitrogen is so much better than the cans or bottles, even if they have the nitrogen widgets inside.
I have found that if I use rice as an adjunct grain in making beer it creates a phenolic compound in the finished beer that gives me a headache. I mentioned this to my sister who used to tend bar and she commented that Budweiser drinkers (Bud uses a lot of rice)tend to get more angry as they drink more, while other beer drinkers get more relaxed. I cannot drink sake at all!
Try this...better than Guinness...especially on tap.
Edmund Fitzgerald Porter - Great Lakes Brewing Co.
http://www.beeradvocate.com/beer/profile/73/226/