What I’ve found with the lightly roasted, medium roasted single-origin fancy pants coffee is that it all tastes SOUR, which is disgusting. A generation of coffee snobs has been trained to believe that SOUR coffee is good coffee, but it isn’t, it’s just under-roasted. The cute girl in this blind taste test video nails it. Good coffee tastes rich and full, not bitter and certainly not SOUR. Whenever I taste sour coffee, I also say, “I really don’t like that!”