I am obese. Losing weight, slowly but steadily, now - I was diagnosed with ADHD a few years ago and decided finally to try meds, and the one I'm on has been used to treat binge eating disorder (which occurs with ADHD sometimes, too, although I think I can blame my mum's eating disorder for a big chunk of my weirdness with food).
It's so weird - the mindless drive to eat all the time, especially sweet stuff, is just gone. Trying to explain it is odd - my doctor said a lack of appetite could happen, and it did at first, just a general lack of hunger where I couldn't tolerate food even when my stomach was growling, but now I can eat when I'm hungry and I just ...stop. When I'm full. And I notice that I'm full - before, I was done when the food was gone. Now it's like the craving feeling isn't there so I can notice what my body is actually saying.
I know this might not sound useful, but it's slowly teaching me what my body does and doesn't want and that's something that can be learned over time. A lot of people are overweight because something else is overriding that ability to determine the difference between "my brain wants this because it'll feel good" (sensory input, sugar, emotional attachment to eating) and "my body needs this right now".
I'm not saying all food should be eaten for fuel purposes only, food should be absolutely be enjoyable, but I'm coming to realise how fucked up my relationship with food is and that my primary reason for eating was comfort, not fuel. That meant high fat, high sugar, 'treat' feeling food, and lots of it, because more food = more (temporary) comfort. And that kind of food is addictive, and then it's a downward spiral. Now I don't get the same kind of emotional kick out of eating, I'm learning even on days I don't take my meds to dissociate food with happiness, and it's doing me the world of good.
(Also, don't think for a second I'm a preachy, 'look at me I lost all this weight!' person - I'm still fat, and still have a disordered view of food in a lot of ways. I know all too well how hard it can be to look back at an empty biscuit packet and not even feel shocked at the amount you ate, even though you probably should. I know buying 2 pastries from Co-op and eating one before you get into work so people see you just eating the one at your desk. But almost all of that was the misinterpreted view of comfort food would give me, and that can be tackled with the right therapy - not meds).