I agree with not doing 'diets', but rather making new habits and lifestyle choices. What about intermittent fasting makes it unsustainable? I have been eating this way about 80% of the time for a number of years and I find it quite easy to stick to.
I used to think calories were important, but I don't think that's the case anymore. However, I think lifestyle changes like 'carnivore'-style eating and IF are effective because of the simplicity in the approach. When I'm strict, it can't put on weight no matter how much I try eat.
I think timing of food as well as light conditions have quite a significant impact too, and I'm warming up to the idea that they are more important than most other factors.
Personally, these changes had some of the most profound effects for me in terms of body composition and wellbeing. Meaning eating close to sunrise, minimising eating after dark, especially late at night, and trying to eat outside as much as possible.
