The other day, at home, I opened a bottle of your average ČIPE—Český India Pejl Ejl, a bit of a scruffier cousin of IPA—and by the way, it was a half litre bottle, as it should be for pretty much anything below 8% ABV, I hate třetinky, and I'm not a big fan of sedmičky, either, but I digress.
It was a new beer for me (its name isn't important, this isn't a review), so I paid extra attention. It started juicy, quite nice and juicy, until a mineral note crept in, getting more intense with each sip, to the point of becoming almost unpleasantly pervasive. But then, about two thirds down the pint, someone smacked it on the back of the head and told it to stop behaving like a twat and play its role, which begrudgingly did, and I ended up enjoying the beer, not as much as at the beginning, but a lot more than I thought I would.
The moral of this: to properly evaluate a beer, drinking is far better than tasting.