Comfort and Convenience
Seating preference is personal: height, reach and how upright someone likes to sit all vary, so a position one driver settles into quickly can feel wrong to the next. A shared car is simply set differently by each person.
Safety and Driver Assistance
Before setting off it helps to know where the wipers, lights and demisting are. Working that out while stationary means less hunting once weather or traffic changes, and it is easiest done on a calm, familiar route.
Multimedia and Connectivity
Battery level matters most when the phone is also doing the navigating. Where onboard charging is available and the right cable is to hand, a long loop of errands ends with a phone still usable rather than flat.