The Chinese and Japanese use porcelain chopsticks, while Koreans sometimes eat with steel chopsticks.
In Japan, I only saw wooden (sometimes bamboo) chopsticks. In Korea, I saw mostly metal (stainless steel) chopsticks. They took a bit of getting used to, but then they work just as well.
The Vietnamese Traditional Sticks which only the mandarins ever used are special in that they are distinguishable from Chinese sticks. They are twice as long.