There's a very noticeable difference in taste between pasteurised and UHT milk, and anecdotally, based on discussing with multiple friends over the years, people who are used to pasteurised think UHT tastes worse, people who are used to UHT don't notice the difference, or notice but don't mind either way.<p>Personally, as a Brit (pasteurised is the norm) who has lived in France and Belgium, I'd always choose pasteurised. To drink on its own, UHT is significantly not nice to my tastebuds. With breakfast cereal its OK but still worse. A small amount in coffee and I don't notice the difference.<p>In Paris, finding pasteurised was pretty easy to do - although shops gave much more shelf space to UHT, I rarely struggled to find fresh milk. In Belgium on the other hand... near where I was living in a city, only one of 4 chain supermarkets and none of the cornershops sold non-UHT milk.<p>It's quite possible that if I spent <x amount of time> drinking lots and lots of UHT milk eventually my preference might change. I'm not planning on trying, though.