Also, when eating out in Western culture you are more prone to just ordering your own meal, whereas in Chinese culture it's typically family style.

It is also, with few exceptions, acceptable to grab food in the 'center' with your own chopsticks. I guess chopsticks don't get dirty :)

One thing that drives me crazy about chopsticks is when you want to cut something, you have to do that X trick and sort of cross the chopsticks, or use the spoon. I'm a wiz with chopsticks, but a knife and fork is the ultimate combo. It wins at every category except noodle soup and sushi.