As a passenger in the car, whats the things a driver does that pisses you off, makes you uncomfortable, or terrifies you?
Personally, I find it endlessly frustrating and even terrifying to be in the passenger seat with a driver who jumps in the car and immediately goes.. Then worries about Seatbelts/Radio/AC/Mirrors/Plugging in Phone/etc etc while driving.
My ex would try to maintain an exact speed by slightly ecxelerating then let off the gas over and over, just tap tap tap on the gas. 100 miles of tiny lurches.
I've definitely had to teach myself to stop doing that. Now I have all the adaptive cruise control stuff which works perfectly fine for this task and saves on consumption.
I'm not sure I was doing exactly what they describe, not sure I was tapping as much as I just wasn't staying regular and drifting +/- 5km/h to the point I got a couple complaints about it. I never realised it before and after that worked on keeping steady and it came quickly.