to be honest I don't pay a ton of attention to my diet; a couple of years ago out of curiosity I kept track of my weight daily and accurately recorded my daily calories for about a month or so.
what I found is my weight didn't vary more than a couple of pounds over that period and my calorie intake was pretty high (~ 4000-ish calories)
I do try to eat healthy- lots of fresh fruits, veggies, lean meats, whole grains, etc, but I don't balk about eating a double cheeseburger or pizza every now and again (or a microbrew or two! :D)
I think it's important to eat healthy, but regular exercise trumps diet in importance imho
