i think they can be the most beautiful, when they're not goblinas (don't feed them your cum after midnight or get them wet).
but also the fact they worship white men and have an inferiority complex makes it even hotter. because they're easy and willing to degrade themselves. but, if you get one that isn't fucked up from the high rates of molestations, she can be a real trad wife.
besides the fantasy and maid RP stuff, I think their ethnic features make them more desirable, the dark hair and eyes, caramel colored skin (a permanent tan), but having the features of a european woman because of mixing, all makes for one hot senorita that drives me crazy