Interesting about the horn thing. I've noticed not a lot of people use it here, but that's true for most of western Canada.
I'm a maniac on the horn when warranted. You want to put your makeup on and the light turns green? HOOOONK! You want to go 10-20 under the limit and sit in the passing lane? HOOOONK! You want to turn left in front of oncoming traffic doing 70, with so little room that my brakes actually squealed (less than an hour ago by Market Mall; idiot) HOOOOOOOONK! I don't just toot either, I let out a full blast for the entire time the car is capable of causing an accident. I've managed to avoid 4 or 5 high speed collisions since moving here, and every time the stupid ass gets one hell of a horn bleat from me.
I've never thought it could be considered rude... I wonder how long it'll be till I get the snot beaten out of me by someone who doesn't get it.
Summing up Calgary is easy - passive and inattentive drivers. Honestly though, drivers here are about the same as drivers in Winnipeg/Regina/Saskatoon. Which makes sense, half this city is from those 3 places. Very passive, slow moving cities to drive in. I've just spent far too much time on real freeways to handle it anymore.
I will say one thing though - I thought the cellphone drivers were bad here. They are, and they're almost always doing 10-20 under the limit, and not signalling, and weaving all over the place... but they're nothing compared to the US. EVERYONE down there has this incessant need to yap 24/7 on their friggin phone.
I can't wait till the laws come in on this issue.