We don't have a drastic difference but there IS one. I'm from Estonia, you know, the land of blonde, thin, and round blue-eyed people (although I'm not quite blonde or very thin); my boyfriend is Mexican-American, tan, dark mysterious almond shaped eyes, curly black hair...
Funny thing is that I never look at him as non-white, it never mattered to me either. It's only once in a while I tell him "You know, honey, you're not a European, like I thought I would date!"
When I was small, I lived in Soviet Union, when Estonia was part of it then. We had only 2 channels and later they started showing us all those Mexical serials on TV, the whole country (Estonia) and Russia was crazy about those serials. We watched them one after another, for years. Could I have ever imagined that one day I would move to U.S. and meet a Mexican? If someone told me that in the past, I would not only laugh at them, I'd think they were crazy.
We have religion issues too - he's Christian, I'm spiritual but not religious. We learned how to deal with it. We do have our differences, but lots of things in common, including life philosophy. Oh, and of course we love each other really, really strongly.
When I see an interracial couple on the street, especially when it's obvious how different those two look, it always makes me smile. I really love when people put aside stupid measures like color or looks and value more important things like human spirit and personality. Yey those couples!