I eat whatever I feel like. I'm not especially into carbs though - I'm happy with meat and vegetables. The best bit about a burger to me is the meat and the salad so I usually end up chucking the bread off. If I feel like a big bowl of creamy pasta, I'll have it though.
I exercised fairly regularly, although this was to build strength, flexibility, and endurance. Never to lose weight. I have some health problems, but that training continues to see me right today.
I never eat anything low calorie or with sweeteners in. It's unsatisfying. I prefer to eat delicious food.
I stop eating when I'm full. I'm never hungry for breakfast so I just don't eat it. I'm well up for midnight snacks though.
If I feel like my clothes are getting tight, I'll make sure I go to bed hungry for a couple of days and then go back to eating normally again. I don't find being hungry unbearable - it's just a sensation, not torturous.
Also, I have a naturally fast metabolism from what I can tell.