I also hate these questions because there is really no answer. Everyone has their own tastes. Not everyone will be attracted to the same thing. However, if we are going to make a sweeping generalization, consider this: White girls are interesting to some people, simply because they are foreign. They sometimes have traits that are considered more desirable (big boobs, height, blond hair) to some individuals. Japanese girls are what the average Japanese man is used to. They know what to expect more or less in language and culture. With a white girl, there is the element of discovery and novelty. A half Japanese girl, on the other hand, is unfortunately neither. Depending on where and how she was brought up, she can be fully American or fully Japanese or somewhere in the middle. But, she will almost always loose the novelty of being western while at the same time, not being considered fully Japanese. This, as I said, is a sweeping generalization. But most of my half friends thought of it as more of a deficit than a merit when they were in Japan.