As a yank my favorite thing about breakfast in europe is it has... vegetables. I skip breakfast a lot because it makes me sluggish, but after a trip to Amsterdam for work, I started doing what I had at the small hotel there: some combo of cold cuts, one or two bite sized pastries like in the picture, some sliced tomatoes with a bit of salt, some peppers or green beans, some cheese, and a hard boiled egg. Occasionally some kimchi or saurkraut, but that I never had with breakfast in europe.
My only real gripe about EU breakfast is the coffee. Absolutely delicious but gone to fast. Even if inferior, I need volume. Coffee is my emotional support beverage to get me through the first half of my day. It's either that or a pitcher of bloody marry's and I've been sober a while now.