Hungry all the time?

It really seems that calorie restriction is the way to go - you live longer, it prevents AD, etc, etc.
Is it worth being hungry all the time though? Do you become less hungry as you do it longer?
I get really grumpy when i don't eat - I'd be healthier, more clear headed, and pissed off all the time. I don't think anyone wants that.

A recent study directed by Mount Sinai School of Medicine suggests that experimental dietary regimens might calm or even reverse symptoms of Alzheimer's Disease (AD). The study, which appears in the July 2006 issue of the Journal of Biological Chemistry, is the first to show that restricting caloric intake, specifically carbohydrates, may prevent AD by triggering activity in the brain associated with longevity.