I grew up with pasteurized milk. As an adult, I tried unpasteurized milk. The taste is different, was a bit weird at first. After a couple of glasses, I much preferred it over the kind I grew up with (it's just so much better), and it's all I drink now. Normal pasteurized milk tastes like low-fat now (i.e., it tastes like drinking water from a glass that had a little milk in it already).

So I don't think it's quite so simple that everyone always prefers what they grew up with. But you're right that we often need to get used to new kinds of food before we accept it.