Drivers who don't know how to get on and off of a freeway. When my wife is with me in the car and I start complaining about drivers that sit at the "ON" ramp and wait until there is a 15 second gap between vehicles before entering the freeway, she says that it's the pilot in me coming out because I am used to having the sky to myself, which is not true, but there is a lot of open space up there. And then there's the driver that goes about 90 mph to get ahead of me, so that he can quick cut over and get off the freeway, all the while there is no one behind me and he could have just fallen in line behind me and got off without risking both of our lives. This is one reason why I have always said that I would rather fly than drive. It's a lot safer. There is auto accidents everyday. In fact, there are hundreds of auto accidents every single day just around the U.S. You seldom hear of an airplane accident, unless you live in Alaska where they average one per day. Think about that.
My favorite Google picture of a Boeing 767-300 on takeoff. This is just like the plane that I flew.

My favorite Google picture of a Boeing 767-300 on takeoff. This is just like the plane that I flew.
