Not really much to be said about this, sadly. I don't find duty finder a very good reflection on the quality of the people playing the game because 95% of the time with systems likea duty finder in MMOs you are trading community for convenience. It kind of naturally comes with the territory.

That said, I almost have all classes to level 50 now and I must say that my experiences with players in this game have been almost always positive.

I've never been booted, never had a fight, don't recall anyone rage quitting out, etc. I'm not sure where you guys are finding these groups, to be honest :P