I am always in favor of diversifying your different foods. Buckwheat and wheat aren't the same. I think it's great to try both. You might find a preference though.
I personally will watch reponses to your question. I normally eat the grains whole (mostly brown rice, wild rice, buckwheat) and use whole wheat flour for baking. I haven't ventured out to other uses of flours--mostly for time. I have been mostly using raw veggies and unprocessed grains with beans. When I've time, I might make a stir fry with my veggies and beans.
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