...
Can't vouch for the Serbians, but the female Romanians I've known,
are spectacular 
John, Serbs and Romanians have traditionally been GOOD neighbours, with the exception of a period during World War 2, when Romania was goverened by a nazi sponsored local nazi regime. Even in the darkest days of Nikolae Causcescu, Romanians were still good neighbours and small scale border trade never ever stopped, no matter what.
As for Romanian girls, what can I say - tasty! Serbian girls are a little more sophisticated, and tend to be blond, as most Slavs are. Of course, some blondes are really brunettes in disguise, but hey, that's what makes it interesting with women these days, the peeling down of the make-up.

Cheers,
DVV