It's not a coincidence that people mate within their own ethnicity. White people do it more often since they are the majority where most of us live. But with other ethnicities it can be a combining factor to be part of the minority and to deal with the issues it will bring. Usually background matters and the primal logic of "if you look the same, you are the same". These two are strongly entwined.

I usually prefer white people and mulattos aesthetics wise.