What Charles said is not accurate. Asian people do not believe Caucasian people are superior at all. Some people link some Asian people's preference of white skin to the West; but it has more to do with a class system where royalty was lighter since they didn't spend their time outside in the sun like the farmers; it's actually pretty similar to how Victorian England felt about their own class system and skin colors. But like the old Victorian view, this idea is not shared like it used to be. You see people of all different colors in Korea. There's even a half Korean half African American singer who is very famous in Korea. And Seoul is pretty much Korea's NYC; very globalized and very diverse.

No matter what you look like, you will be viewed as simply American. What will dictate your experience more than your skin color is your attitude. If you go with the attitude of everything should be like it is in America, then you will not have a good experience. Remember you are visiting their country, that they have a different work ethic than the US (they work much harder!), they don't celebrate as many holidays, and expect social differences (ie. they stand closer together, slurping soup is considered polite, and polite manners are very important).

If you really have an interest in going and have an open mind, then go for it. I haven't met a person yet who regretted the experience; just make sure you're using a legit program (EPIK is actually through the Korean government), make sure you have thoroughly read every detail in your contract and discussed any gray areas.

Oh, one other thing...I've heard that there is a strong network of ex-pats in Korea (ex-pats = American citizens working for private Korean companies/schools). So you should have another network of people in a similar situation that you can count on.

Hope this helped and good luck!