I have the same issue. Pre OP, I was told to try different brands of protein shakes to make sure I find a brand/flavor I like especially since I'll be stuck drinking it. Well now, I can't stand any of the flavors I got. My favorite sweets are anything chocolate, and now I hate them. You are lucky your doctor's program has a puree stage. My program is 28 days post-op of full liquids and starting slow but I'll be able to eat normally again minus raw vegetables of course for I believe another month. Only 10 more days to go! Lol
As for feeling full, I am now able to drink more water than a week ago. Instead of sips, I can drink more. When eating/drinking my soups. I eat until I feel a little pain ( only 2-4 spoon full ) and I know I'm full. Remember with a new tummy you have to now basically train yourself to know you are full. I would take a spoonful and maybe wait a min until the next intake. Congrats btw on this new journey!!!