Interestingly the whole PUA thing is about seeing people as predictable animals with certain behavioural motivations and needs. So I suppose this kind of thinking should be encouraged, rather than the humanist, pretty unique snowflakes we see ourselves as today.
Even as young children, we naturally group with those who are similar - the white kids in school have mostly white friends, and the black kids hang with black kids etc. This is unfortunately discouraged by the spineless multicultural appeasers who want us to turn into one brown colour and be all the same in order to get rid of "racism". There is always some mixing in social circles but we usually gather with our kind, which is why even in "multcultural" societies we still have entire districts populated by one ethnicity almost exclusively. As these ethnicities have no real power over the establishment and not much cultural identity, they almost automatically become lower class and develop voaltile gang culture and display huge resentment to the main population, even though they are often in a country with far better quality of living than their ancestral homeland. This is only very rarely negated when the ethnicities in question are rich and move into upper or middle class, as you can see with fairly well off whites that move to exotic locations. For any british members out there, you'll notice that a lot of whites have been leaving britain for other mostly white places that are on the rise, rather than this sinking ship. Lots of brits are moving to spain but australia and canada and the us are also popular. I can see myself doing this soon, as europe turns into saudi arabia.
As mentioned before, the only reason we even have different races is as a reaction to our environment. Even very young children are capable of making this distinction: the hotter the climate the darker the skin and vice versa. Only now through the ease of transport technology and globalisation which welcomes immigrants as customers more than anything else, races have travelled far from their natural environment and spread all over the place. We developed races because we split from each other, now we have run out of space and we have begun mixing together. I'm not sure if this is a good idea.
Being white northern european myself, I am most attracted to other white northern europeans - the paler folk. Also, the most attractive of other races for me tend to be those that look the most white, rather than those that look like a paradigm of their race. You can see this in all races, with the most attractive people to all seeming to be either white or an unidentifiable mix that tends to be popular - kinda like Christiano Ronaldo I guess. People tend to dislike being very pale, but prefer someone in the middle of the spectrum. Though ultimately I think that strength, health and intelligence are the main drives for attractiveness, with colour and culture coming second.