common currency

You have to wonder why Canadians choose to make their coins just like the U.S. For example, their dimes are tiny, smaller than their nickels. I've gotten an American quarter mixed up in my change, and people don't seem to have any problem using American coins. And yet, Americans don't really appreciate Canadian coins. I would definitely complain if I got Canadian quarters in my change. On the other hand, I realize that I've started picking up pennies I see on the ground. I think it's because I secretly rejoice when I can pay for things with Canadian pennies -- these objects that have been worthless my entire life!