Ok, I consider DH to be a coffee snob...so, I'll go based off his recommendations.
He doesn't care for McDonald's coffee, at least not the stuff he last tried. He has to put milk in Starbuck's coffee because it's so acidic, and I doubt he's had Dunkin' Donuts coffee. He prefers home made. I don't care for regular coffee so much.
However, if you want to go into specialty drinks, I LOVE Starbucks!
I typically get a nonfat caramel macchiato. When it gets warmer, I get it iced.