This isnt meant to be about the big differences, like the Brits driving on the wrong side of the road. Those are easy, you cant help but see them. But, me at least, it takes a few expereinces for the little things to register and then they become the things that tell me i am someplace new.
Now, observing differences is not being critical and its not a competition of US vs any place else. Just part of travel.
Lets hope this goes better than the cost of trips thread which turned into a Hindenburg thread.
Two examples to begin.
Numbers. Europeans write numbers in a manner that is substantially different and sometimes, for me, difficult to read. Not typed numbers, but hand written numbers. The extra stroke on the one, the missing stroke on the four, the artistic 9 and 8 and the slash through the seven all come to mind. Then the juxtaposition of the comma and the period .... in many, but not all countries.
Toilet Paper. Need i say more. It’s obvious. I once quipped that the ideal gift when visiting a European would be American toilet paper. Someone recently remembered that and when visiting from the states brought me a couple of rolls. Very much appreciated. My significant other "experienced" the American product and now demands I get more. Last night she began telling some of her employees about it. It was hilarious. I didn’t understand a word (not in English), but from the facial expressions it was obvious what was being said. I died laughing.
Travel is about learning and about new experience and new cultures. Perfectly legitimate to catalogue in your mind the subtle differences.