I'm half-asian, and after going on a 2 month carb restricted diet, not having rice everyday made me WAY more tired, compared to having rice for EVERYMEAL (yes, I consume jasmine white rice for breakfast, lunch, and dinner). Not sure if it's an asian thing or not, but my father, who is full Filipino, consumes a plateful of rice every meal, and as fit as I am, I doubt I could ever keep up with him.
~Ian