As a kid I grew up drinking buttermilk with meals and thought everyone else did. We had cows and made our own buttermilk and mom kept a culture going in the frig. She just added to it and we never seemed to run out. I remember freezing buttermilk in popsicles molds and it wasn't half bad. I once tried adding chocolate syrup to buttermilk but that was a terrible mistake.
On a hot summer day I can drink a whole carton of ice cold buttermilk at one sitting.