I think it's our technology. We have no patience to wait.
Everything has to be done for us by technology, and has to be done instantly.
Cars ahead driving the limit - flash the beams, tailgate, blast past it or run into it.
Order too slow at the take-out - scream at the minimum wage kids, or trash the place.
Web site taking 1/2 second, instead of 1/8th of a second to load - get exasperated and swear at the computer.
Can't wait to tell Justin or Avery you've got a new nail polish - text them while driving.
Don't like waiting in line - shout, or throw papers around.
Can't wait to get home to play video games - speed, run lights, cut people off, drive on the shoulder (Saw them all today).
Personally, I think as much as it removes us from the experience, and there might be some glitches, self-driving cars will ultimately be a lot safer than going up against some of the careless, selfish and certifiable morons, driving out there now.