I think that being in touch with your culture (if its not the one you are living in, like chinese in australia etc) is very important, but when it becomes more important than being in a multicultural society, you should take a step back.
As for inter-racial couples, I'm all for it. Personally I'm less attracted to white-australians, (I'm white) not on the basis of their skin colour, but on the basis of the culture. Wow that seems like I'm being racist towards my own culture; but I think the world is bigger than Australia, no matter where I go I'll always be an Aussie, but I think, personally, that staying within my own culture in regards to relationships is limiting, and ultimately ignorant.
But that's just the way I feel, it has no hold with any other person... yay that sounds like a disclaimer.