Personally, I don't have a problem with 3 TS meals a day, as long as they're spaced out, you don't over-do it (a danger with buffets, especially), and you do a LOT of walking during the day.
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The "problem" I'd have trying to space out 3 meals, is if I wake up early enough for a really early breakfast, then I'll be too tired to stay up for a really late dinner! If I had the energy, I could imagine doing a 7 am breakfast, 1 pm lunch, and 8 pm dinner.
I've done the 3 meals in a day, but when doing so, the first meal is usually just a quick grab small meal CS breakfast. We may use a few credits for CS breakfasts, that we then share.
