I'm reasonably slim (BMI 22)
I dont really follow any diet or bother about 'advice' with what I eat.
I eat a fairly small bowl of cereal or porridge with berries/banana OR a piece of toast with marg and jam for breakfast. I know youre supposed to 'breakfast like a king' but I dont feel like huge amounts of food when I wake up.
I dont snack during the morning. Not hungry until lunchtime.
I have soup and bread or eggs on toast plus a piece of fruit for lunch most days.
I usually snack on chocolate or a biscuit in the afternoon with my coffee, but I dont go mad. A stick of choc broken off a big bar or 2 biccies.
I eat a fairly big dinner every night, but all decent , fresh and from scratch. I had roast chicken, roast potatoes, carrots, cauliflower and broccoli tonight. I'm making a veggie curry with chapati tomorrow, prawn stirfry and noodles the day after etc.
I have a few loose rules I stick to most of the time. I only eat puddings on Sunday. I dont buy too many crappy snacks for the household (maybe one packet of biscuits a fortnight, some popcorn, some bready treat like scones). No crisps, cakes, sweets, ice cream etc unless its a special occasion.
I dont snack after dinner. If I have a big restaurant meal or takeaway or PMT hits and I have a shit eating day, I try to be healthier and more conscious the following day.
Oh, and I drink LOADS of fluids. Probably 2-3 litres of water, 3 herbal teas, 2 decaff coffees, a small juice minimum per day. It fills you up.