From an interview with a Danish reporter:

Q Now, you have, as President, been dealing seriously and intensively with Europe for the last four-and-a-half years. And if I may ask you a little unconventional question: What do you think is the most annoying aspect of the way that we Europeans look at the world?
THE PRESIDENT: You know, that’s a very tough question because if I answer it, obviously I admit there’s something annoying about Europeans, which I don’t want to admit, I don’t want to say that.