Like Robb and MOD said, if you're really hungry go ahead and eat. However, you also mentioned getting bored at lunchtime. I definitely struggled with that a bit at first, but for me it was just a matter of getting over the psychology of the noon meal. You've just been programmed to eat then, but you don't really have to if you're not hungry. I've been able to stay on top of my required office notes much more effectively b/c I'll crank from 12-1 while everyone else is scurrying around for food.
That being said, we get reps to cater lunch to our office about 6 times a month, and if it looks tasty, that's the day I break fast at noon. I have a strict policy about turning down free (good) food.