I can't believe the donut option is winning around here. No wonder the US is a nation of fats!
I don't eat donuts, but voted DD because I actually like their coffee better. I'm a simple guy though and tend not to drink the fancier variety of coffees. I'll usually take it black- maybe with a dash of 2%. That said they can both be overpriced. For one of my many caffeine fixes, I daily bring a thermos of coffee brewed at home, throw it in the freezer at work and have myself a nice, cheap iced coffee when nice and cold. Saves the 3 bucks and change on what is essentially a cup of ice.