I honestly bought every kind Costco had available! Fairlife, Premier Protein and Orgain. I also have Clean Simple Eats powder that I've been using. They are icky sweet and all too chalky for my liking.
I started pre-op last Friday, but cheated a tiny bit on Easter - nothing crazy, but had some chicken and a couple of shrimp.
I just want something more substantial, like tuna, an egg, or chicken - I'm done with the artificial stuff!