I like intermittent fasting ...
Gaining/losing weight is primarily about the insulin system, which IF gets under control.
It's very easy. No special diets or food restrictions. Some of these diets can get expensive and require a lot of time to prepare everything. Or you can't go out to eat very easily.
Basically, with IF, you can just eat from about 11:30 AM to 7:30 PM (or any other 8-hour window), so it mostly just means don't eat after 7:30 PM and skip breakfast.