He-Man always did it for me. That, or Transformers.
I've seen 17 movies so far this year: Because I Said So - (2*); Borat - (5*); Children Of Men - (4*); Die Hard 4 - (5*); Evan Almighty - (3.5*); Fantastic Four 2 - (4.5*); Hairspray - (5*); Harry Potter 5 - (4*); Knocked Up - (4*); The Last Mimsy - (4*); Mr. Brooks - (4*); Resident Evil: Extinction - (3.5*); Shrek The Third - (3*); Simpsons Movie - (3*); Spiderman 3 - (3.5*); Superbad - (1*); Transformers - (2*)
In Sydney they like to honk a bit but in the rest of the country not so much in my experience. When you do get a honk it's often the more protracted HOOOOOOONNNK which is used to register your disgust at particularly moronic or selfish driving.