I was not a Guinness drinker at all until I went to Dublin.
http://travel.webshots.com/photo/2585111580044479105NbzWJD
While it is not as good here, I did acquire a taste for it. I do remember hearing that they have a quality inspection team in Ireland that goes to EVERY pub once a month to make sure the lines are clean and the temperature is right. I was surprised that they kept it as cold as they do.