I can't say enough great things about sugar and caffeine - just (mostly) kidding.
I like both, but I consume sugar reasonably modestly. If I do, it almost always involves counting calories and, hence, a modest amount.
When it comes to caffeine, I drink as much as I want until I see myself drinking too much, and then I just cut back.
Neither one is a problem in my life.
When I started taking meds 20 years ago, my doctor prescribed Mirtazipine (Remeron), which tells my brain that I need food, even when I don't.
I ballooned up (from around 160) to about 230 or so, and I then made a decision (3rd step style) that I refused to live like that.
I am probably about 175 or so now, perhaps closer to 170.
I am a very disciplined eater.
And I like to go out on really long runs (for several hours) in good weather, like the current beautiful spring we're having here.