For me it all depends as well on the region or location. If there are more foreigners, even the coolest Thais loose their temper easier. One example is Phuket, where I stayed something around 8 months.

There are so many foreigners now, that plenty of Thais are upsets and sometimes don't even suppress their anger with foreigners allegedly taking over their territory. And I'm not even talking about the struggles of the local bar mafia with the Russians. There are plenty of contract killings just between the locals alone, let alone fights with foreigners.

And let's not even talk about Pattaya.

But hey, it's maybe like in Real Estate: Location, location, location.

;-)