I've always been a considerate driver (I think!)
I let people out of side roads and I always stop to let people through when it's their right of way. I have to admit though, when I was pootling around in my Mondeo I used to get a lot more 'thanks' than I do in the bimmer....
I used to just smile and say "You're welcome" under my breath but now I find myself having to self-censor my responses when the kids are in the car as I'm finding my responses to be filled with 4-letter expletives more and more these days.
Manners cost nothing...
'57' plate E90 335d M Sport