Not really sure why that seems to always be the case, MMOs are usually more popular in EU, really around the world more popular.
I do find EU players to be, on average, calmer and less worried about achievements, end-game gear, etc. More team oriented. But it is at best slightly more. I think I might be jaded by the few NA players who are non-stop talking spazzes, usually senseless and endless negative blathering. You don’t come across those as much in the EU player base.
Just curious what other NA players think.