Dunkin Doughnuts is the best. Their doughnuts beat the heck out of Krispy Krap and their coffee is better than Starbucks (IMO anyway). My only complaint is that their coffee has gotten so expensive in the last 3 years.
After 10:00 PM: Drunkin' Doughnuts
I live in the home of Krispy Kreme, and for us here in NC, Krispy Kreme MEANS donuts. I think it is a question of what kind of donuts you prefer, the cake or the good ones made by Krispy Kreme.