What is your favorite Beer?

I am a big fan of beer. I especially enjoy home made/micro beers. When ever I go out to places that I have not drank at before, I always try to order a beer that I have never tried. So, now to my question. What is your all time favorite beer?

Ill start: Mine is Guinness, speciffically Guinness "Northstar." It is part of Guinness's brewmasters series. I drank it in Dublin, it was amazing.