I'm never hungry when I wake up, but I think that's mostly just a habit thing. Your body adjusts to expect food on a schedule, if you normally eat on a schedule.

I only eat lunch (at noon) and dinner (at 8pm), pretty much like clockwork. It's very rare that I eat outside of these times during the work week. I don't snack through the work day, and I very seldom snack at home on work evenings. But I still end up eating too much; lunch + dinner is more than I need. I'm thinking about paring it back to just dinner (perhaps 2 days a week starting out), since that's the most important, socially.

I didn't have any problem sticking with my normal 60kg weight until I got over 35 or so, now I'm up to 70kg or so and I can feel my body fat jiggle as I run up or down stairs - an alien feeling to me.