Quoting: daffy
Lets talk about the positive impact of Poland being in the EU.
Like addition to Culture, Cuisine, Custom, Industry, Science, Literature, Art, Etc.
Poland has always been in Europe, and Poland should have been in the EEC/EU from the first moment, except were were occupied by Soviet Russia (after the brutal German occupation). Saying so I don't think Poland is introducing anything new in the cutural sector, it didn't provide before it was in the EU (Chopin, Copernicus, Penderecki, Gorecki, Marie-Curie etc).
One thing Poland does provide is a buffer between Europe and Russia. It has 38 milion people who are pro-Western, have a history of democracy and are themselves a stable society/country. This is of great benefit if not only for NATO but also for the US as Poland is a great military ally for the US. As for the EU, EU is fine and all, but I think Poland should not compromise on a great relationship with the States to gain favour with the French and Germans. :)