Absolutely! Behave as expected and everything will go better.
There's a thing called "the wave of death" where one driver stops in the middle of a road and waves for a pedestrian to cross, but the cars going the other way don't know this person just decided to do that, and the pedestrian has a false sense of safety from being waved across... Bad shit.
I love people in traffic thanking me, even if they had the right of way.
Happend to me this morning: I had to stop behind a parked car in my lane to let the guy in his lane go first past, he thanked me although I just followed the rules and it instantly put a smile on my face.