Come on over Clive and I'm sure that you will never leave!
I like Korea a lot but will never live here forever. I want a more stable enviroment for my kids especially one where they can be accepted (half-Korean/American and half Irish) more than what Korean kids are doing now. It just takes time for society here to accept them more. Also students are hit in class by teachers. I have seen it many times. Not going to bring up my kids in that. Also there is the possibility that they will start to learn Korean more than English and I won't be able to communication with them much!
Of course there are international schools but they are very expensive and I have heard of some parents even home schooling their kids but if I can get a good teaching job somewhere in Europe then things will be a lot better. Of course I have to get the masters first before I even think about a decent job and have kids first before I even think about schools!