From my online experience untill now, firstly Poland's online gaming community is sadly represented mostly by really young people, kids who don't think what's going on around them, that have really hurt the reputation and the intelligence levels of that country. Of course there are always exceptions.
Greece, is mostly separated in to groups. The arrogant children, zero intelligence and zero sence of teamplay/co-operation, and the other half which contains really skilled, intelligent people with great sence of partnership. In a few words we are at the top or at the bottom. There is no mid state.
Lastly, Romanian people are really great people. I am friend with many romanian people with friendships which lasted more than 1 week. Of course, there are some exceptions, as I have met arrogant romanian people or even not trustworthy ones.