Nervous about post op diet vs diets I've tried

I don't do low fat at all. Low sugar is a great idea, but I would absolutely stay away from white carbs -- bread, rice, sugar, potatoes. And contrary to some opinions, I don't think brown rice, whole wheat bread, or sweet potatoes are any healthier than their white counterparts.

No one got obese from protein or fats. It's just not usual to eat too many of those things. It's all the other crap that we got fat eating.