The milkman used to deliver milk in glass bottles twice per week to our house, so I have no idea what kind it was. I never really liked to drink milk and haven't drunk a glass of it by choice in about seventy years. However, I do use reduced fat milk occasionally on cereal or in really strong coffee, and I like a lot of milk products, especially cheese and ice cream.
My mother loved milk and drank it every day until she died at 102, so I guess it isn't really bad for you unless you are allergic to it.