when i grew up i used to drink fresh (pasteurized) milk, later switched to UHT, nowadays i tried even pure raw non pasteurized milk from farm milk vending machine and honestly i can't say difference between pasteurized, raw and UHT, all of them of course full fat 3.2-3.6%, these days i even tried 5% Jersey cow pasteurized fresh milk but that taste to me like spoiled milk and can't drink it, on the other hand i tried lactose free full fat UHT milk and i was surprised by nice sweet flavor, very suitable for children (it was surprising to me considering i noticed zero difference between 82% butter with it without lactose)

for practical reasons i prefer UHT milk, much easier to store and keep in fridge only 1-2 boxes you are going to drink