Oh my goodness, DH and I do the "I don't care; you pick" dance all the time. We generally settle things by having one of us narrow the options down to two and the other choosing one. It's saved us many, many headaches.
My FIL does the PA thing a lot. Trouble is, giving him what he "wants" doesn't work because what he really
wants is to be a martyr. So by taking him up on his "Don't mind me" stuff, he gets to feel self-sacrificing. Overall this isn't too bad, though, because he's not one to rub it in--if that makes sense. (He has PA tendencies, but is otherwise a decent guy.) So everyone's technically happy.