I've noticed something since I moved out west a few years ago: people here are REALLY uptight about using their horns and/or being honked at.
I grew up on the east coast, mostly around D.C. and spent lots of time in Philly, NY, etc... We honk. Quickly. Light turns green and you don't move? You have about a second, maybe a second and a half before my hand hits the airbag pad. Get moving! You're part of a system that isn't all about you and your phone, so my horn is the method by which I can snap you back into reality to get the system moving again. Nothing personal! Just like when I walk my Lab and she hones in on a cat or rabbit in the neighborhood... A swift light kick to the rear gets her refocused on the task at hand and she gets back on with a nice walk.
However, it seems that out here in the Great West very few people use their horns. For my own experimentation I have sat quietly at a stoplight queue after the green ball glows for over five seconds in total silence! Not ONE person lights up the leader to get their attention re-focused on obeying their traffic signal. When I first moved here I actually had a guys get out of his lifted Utah Truck and threaten to kick my ass for honking at him when he didn't turn left despite zero cross traffic and a flashing left turn arrow!
Am I just some East Coast Asshole that loves palming my steering wheel pad?