I think it has a lot to do with what you've been exposed to and how your tastes have developed. Where hops are grown, the beers have an abundance (over-abundance perhaps) of bitterness and good flavor and aroma. If this is all you drink, your palate will get used to it and anything less will pale in comparison. It's kind of like eating spicy and/or hot food. If you eat Indian food the way most of my Indian friends eat it all of the time, the stuff they serve in restaurants will taste like white bread. What amazes me, is after drinking the super bitter IPAs and DIPAs we can still pick up on the subtleties of a Kolsch. The IPAs I brew pretty much run the gamut as far as IBUs go, but I tend to go toward the upper limit, even for an east coast guy.

I do love my crystal malts though.