I know this take is too nuanced for /pol/ and it's still kind of fucked but I've always been surprised by how mixed race people tend to come out totally fine if they're anything but black.
Some hapa women are really hot. Mixed European / Middle Eastern people just look Eastern European. Indians - questionable. Latinos are weird because most of them are already 1/4 Iberian so IDK how they work into this. But most Eurasian races mix just fine with each other.
And then if any of them reproduce with a sub-Saharan negroid, the kids come out all retarded.