I hit the Dunkin's drive through on my way to work every day for years. I loved the stuff.
Then I moved away, discovered good coffee, and can't go back.
I recently visited my old hometown and went to Dunkin's out of nostalgia. The Munchkins were awesome. The coffee was so nasty I felt bad for the parking lot I dumped it in. I tried a different Dunkin's another day, thinking it was a fluke. Nope, same nasty stuff.
Either it's changed in the last few years, or I've just moved on. But I'll never drink the stuff again. You don't have to pay for Starbucks to get much better coffee.