I don’t actually drink milk myself but with my kids. every different brand, and even sometimes the same brand bought in different stores (the health food store vs. the supermarket) tastes very different to them.  With my son, every time we change (always fat-free organic milk) brands, he doesn’t like it at first.  So my husband started putting Nestle’s quick in it - I was against it - and now he drinks anything.  But if you don’t like the organic at first, you’ll get used to it.  The big difference is that organic milk costs more.