Dogfish Head 60 minute IPA is really, really good. I'm not a fan of bitter beers, and I was a little nervous when I picked it out--The other time I've tried an IPA, it was more bitter than I liked. I'm no expert at catagorizing a beer's flavor, but there's a distinct grapefruit taste that fits well. Well balanced, nothing overpowering, but lots of good flavor.
I will be buying more, even though it is out of my way.