Americans are a bunch of rebels!
I'm such a perfectionist that I just imagine myself taking grains of sugar off of my highly accurate scale to get just the right amount. Using cups/tablespoons, etc, I do see where recipes are flawed in that you have to know what consistency you want the batter/dough/sauce/whatever.
I did, however, appreciate the use of the metric system in my engineering classes. Boy do I love the number 10 and how I simply had to memorize the word beginnings and scientific notation assocated and I knew all of the measurements there ever could be.