I love many things dairy. I allow myself a pound of butter per month, and am a fan of many delicious cheeses. It's not the mainstay of my diet, but it's a major component.
I never got the low carb flu, but I think it's because I was never a high carb eater. Being a person who questions authority, I never really bought into the govt advisories to eat 50-60% of my calories as produce.
The only thing that fatigues me is a high carb day. It doesn't really matter where those carbs come from.
"Right is right, even if no one is doing it; wrong is wrong, even if everyone is doing it." - St. Augustine