I know this forum has been dead for a bit, but I would like to share my 2 cents here.
I've had 4 serious relationships thus far, and all of them were Caucasians. I, however, am mixed. I used to wonder the same thing. What do they really think about us mixies, or Asians, or Arabs, or Africans? If they are open to it, how come we don't see a lot of it.
Well, my question was answered by my girlfriend. White women are brought up differently than their counterpart. Thus, they have a different mentality. A white male will be all open to relationships, fun nights, casual noogie with other races because they aren't thinking of the future. Ask them if they are planning to get married with them. Mostly likely, he will scratch his head and say "I don't know, man. The s*x is pretty good though". A female will be thinking of the future. She wants to find a mate who she can see herself living her whole life with. Someone who will fit in with her family. No culture barriers. So she naturally reserves herself to suitors in her own race because she simply more comfortable with them.
When it comes to attraction, it comes down to looks. I am really really REALLY sorry to say this, but a look of an Asian (Flipino, Chinese etc) is appealing to a limited, mostly their own, audience only. If I go out with a Flipino, she must really posses something extraordinary. I am just not attracted to them one bit. I am sure Flipinas aren't attracted to me either. Absoloutly nothing wrong with that.
Indians and Pakistani's, even though should be considered a separate category, are subjected to same rules. Why separate categories? They are different in nature. They are brought up differently. They also look quite differently too. One just has to have the observant eye. While Indians are usually more open to accommodate, Pakistani's are closely knitted to each other. I would advice any freedom loving white female to not date a Pakistani guy, though how liberal he seems. His upbringing will kick in eventually and you wont like what you see.
So, date away where you feel comfortable. Just be aware of eventual consequences.