Seoul is the place you go, if you are living here, where you either: want to party, want some good food from back home (in my case Taco Bell), want to see and talk to people that speak your language and ride a really cool subway. The system there is awesome...and it really is a nice place to escape to, but not live, if teaching in Korea...if you want a REAL Korean experience. It is basically the New York of Korea...a melting pot of all cultures.
Don't get me wrong, there are some beautiful places there...but it's a little to familiar and a little to close to the North Korean border for my taste.