There are quite a few stunningly attractive ladies working around the city, but I much prefer Asians (although I can appreciate the beauty of any nationality, I hope!). As such, the list narrows down. With Asians, as with many other large-population and large-geography ethinic group, there's a considerable variation in facial features. It's pretty easy to tell a Northerh Chinese from a Southern Chinese, and both from Japanese, despite the same origins. Thai are easy to spot from Cambodians or Vietnamese, and so on. In Europe, it's easy for me to tell someone from the Nordic countries from, say, the Netherlands, and I can usually tell Spanish from Portuguese (although not reliably enough!).
Having said all that, facial attractiveness is quite subjective. Some from Kim Kardasian attractive, some don't. I prefer southern Vietnamese to northern Vietnamese facially, all things considered. Symmetry has long been the key factor, but in looking at ethic features it also has to do with flatness of the face, cheekbones, eyebrow ridges, and so on, all of which we process subconsciously. All that to say, to each their own!