I kick ass with chopsticks. One of my Korean friends, while I was in Korea, said that she was constantly berated for holding her chopsticks "like a beggar," and apparently the way I used them was considered more refined. Arbitrary BS in my opinion, but I do know how to use them well and can eat anything from sushi to pho to rice with them.
Most Asian foods are designed with chopsticks in mind, so I've found in general it's easier to eat with chopsticks as opposed to a fork, so long as you know how to use them and have cultivated enough coordination to use that knowledge. Plus it just makes the dining experience more authentic.
DC, are you really sure about the Thai food thing? In Bangkok and Phuket I saw the locals eating with chopsticks all the time. They had large spoons for dividing up the portions, and it's customary to share everything and serve one another, but when it came to eating usually they'd switch to the chopsticks.
My funny story with chopsticks etiquette is from Japan, when a dining companion left their chopsticks sticking straight up from their rice when they got up to use the restroom. Our Japanese hosts were mortified. Apparently this means something like you are offering your food up to the dead... they respect spirits there but generally try to avoid calling their attention.