As an Asian-American, I'm subjected to a lot of stereotypes. Now, while the actual number of comments has diminished through the years, the fact that I still hear them remains a source of a lot of incredulity. Apparently, I'm not the only one who thinks this. James Yeh has this hilarious little commentary on stupid things people say to Asian-looking folks. And while you're at it, check out his blog. Good stuff.
I have had three proposals from complete strangers. Hello!? We aren't all mail-order brides looking for a way to stay in the country. Some of us were born here and actually speak without accents. Imagine that.
Advice: We (Asian-Americans) know that we look "exotic" and sometimes your curiousity is ovewhelming. Go ahead and ask what our background is, but please don't ask, "What are you?" My standard reply is "Human," or "Female."