All countries are more or less the same.  They have the same mixture of furballers, hordlings, strat guys, nice guys, jerks, characters, and jokesters.  As well as the occasional gal. 
I think perception of difference is just an opinion based on limited exposure/experience.  I used to believe that there were certain traits but the more I flew with the folks on the three countries I realized it's pretty homogeneous.