Comfort and Convenience
Seating position is a common example: one person prefers sitting high for a clear view forward, another lower and more reclined. Neither is correct, which is why comfort is best judged individually rather than described in general.
Safety and Driver Assistance
Spending a few minutes with the lights, wipers and mirrors before setting off is simple preparation. Knowing where these are means less improvising later, when weather or traffic leaves little spare attention.
Multimedia and Connectivity
Keeping a phone charged on a long drive is a separate matter from making calls through the car or playing music, and the way each is handled can differ. Check whichever of the three you rely on.