I did a month of intermittent fasting for kicks, where I would only have water on Mondays and Thursdays. In the morning, it wasn't too bad, especially if I could get engrossed with my work. Afternoons were tough, with some stomach pangs and a strong desire for food. After that afternoon hump, though, I was usually fine and didn't think of food until well after dinner, where I would have some strong cravings for late night food. The odd thing is the next morning, I wouldn't be starving-- I would not really be hungry again until closer to lunch that following day.
I ended up losing about 12 lbs over the course of a month. It was an interesting experiment. After going back to regular eating, I put about 10 of those pounds back on.