Some people (such as my sister and Mom) are lucky to have a metabolism that handles carbs just fine. Other people (like my Dad and me) can't handle them. What's really sad is seeing him (who has diabetes and need to low-carb) struffing his face with low fiber, high carb foods. But that's another topic. :-p

Anyway, I do better on a high protein diet with moderate fat. I find this moderates the calories that a high fat diet might push too high. The stable blood sugar from low-carb has been noticable. I no longer feel like I need a Coke and candy bar when I start work at 3 pm, or at 7 or 8 when my blood sugar would dip after dinner. My energy level has also stablized - no more ups and downs.

Every time I eat a high carb meal I pay for it big time, so I try to keep my cheats to a minimum because I know how I will feel and what will happen.