I'm in Chicago but grew up in Ohio which meant dating a lot outside of the Korean population. That being said, I've run the gamut of ethnicities; Indian, Caucasian, Egyptian, Australian, and lots of Asian ethnicities. A lot of my other friends including a Chinese and Phillipino guy are both married to Caucasians.
I get what some are saying about the height thing, but it's never been a huge factor for me and I'm not super tall (5'6.) It totally goes back to the whole dating-age threads of comfort with yourself more than anything.
Incidentally, I've found a girl that I want to end up with who happens to be Chinese, and my Korean mother is throwing a huge fit.