I have a touch of OCD, or maybe I'm just a control freak, so I have to work hard at not quantifying everything. When I start to count calories, it's a sign that I'm stressed out, that I'm feeling out of control of my life, and I have to consciously refrain from doing it. I counted calories for so many years of my life, I probably know how many calories I'm ingesting every day without even actively counting. But that's just me, for others it may be very helpful. It's a very individual thing.