For me nationality is largely irrelevant and I have had some fantastic punts with Polish, Hungarian, Czech, English, Bulgarian and (yes!) Romanian WGs over the last year. I think it partly depends on what area you are in. Generally it seems that in London finding a good English WG at anything like an affordable price is rarer than hen's teeth, however, I have found elsewhere in the country there are still good English girls to be found, and this year found a couple of real gems in the West Midlands.
There's good and bad of all nationalities and seeing an unreviewed WG for the first time is always a gamble (or punt) and you need to learn to pick up the little clues in the AW profiles to reduce the risk. Particularly important with Romanian WGs where an unrealistically long and ill-thought enjoys list and the use of text to make heart shapes, Playboy bunny etc. are instant red flags.
It is very difficult to be anti-EE in London as you would then more than likely end up being celibate. I suspect that in some other areas in the NW you could quite happily punt without having to see an EE girl. Personally I can't see the point in setting out to avoid any particular nationality, just be discriminating in your choices, much easier now thanks to those that leave reviews in UKP.
