Personally I liked the slimeiness of 1.4. Ok not really
1.6 because it didn’t give me horror farts. Everything before that did. I still get them sometimes with 1.9, but not all day every day. My favorite from taste is the chocolate powder (I think it was version 1.8 and 1.9). I drink around 2000 calories a day every day. The premixed chocolate is OK, but not as good as the powder.
1.9 Cacao powdered is my favorite. I won’t even drink Original powdered now, though I haven’t tried 1.9.