Avoid South Korea like the plague. Hands down the most revolting and dirty country I have ever been to, and the people are extremely xenophobic. Don't even get me started on their sickening practice of farming dogs to later torture and eat them. As a dog lover, this was absolutely abhorrent to me. I bailed out pretty quickly.
The school I worked for was awful. They treated the teachers like slaves, and there was nothing you could do about it. Korean workers have few rights, so a foreign worker you have even less rights. My school tried to take my passport to prevent me from leaving, but I wouldn't surrender it. My embassy helped me sneak out of the country to avoid me from being fined for breaking my contract. I actually enjoyed the teaching work. Everything else about Korea though sucked shit. Nothing could ever get me to go back. I boycott everything from that country. On the bright side, I lost 20 pounds in a month because the food was absolutely revolting. I would wait until my stomach was in knots before I would eat, and then I would only eat enough to make the pain go away. The smell of kimchi still makes me want to wretch to this day. They put it in almost everything! I love many kinds of ethic food such as Thai, Indian, Mexican, etc, so it's not like I have a bland diet. I just can't stomach Korean food, and no I didn't eat dog while there even though I had the opportunity to do so.