Personally, I am not a big fan of tours. I like to do research on my own and check things out on my own schedule. Is there anything in particular type of attraction (cultural, shopping, etc.) you'd like to see?

One thing I'd definitely recommend is visiting Cheonggyecheon at night. It used to be a stream many many years ago. Then they built over it with a highway. I think about two years ago, the Seoul mayor embarked on an ambitious project to destroy the highway (which was heavily used) and to restore the stream. It's beautiful at night.