The best Guinness I've ever had was in Cork, Ireland. It's like very, the head is very, very fluffy and thick. And it just tastes fresh and wonderful. Whereas a bad pint of Guinness, there'll be no head on it at all. What you want from a good pint of Guinness is a good thick head that rises above the top of the glass,. That will stay thick all the way down as you drink it. Until at the very bottom, when you've finished the beer, there's stillLike a blob of foam at the bottom, which you can even swish around and drink as well at the end.