Comfort and Convenience
Seating position is a common preference: some drivers want a high, upright view over the bonnet, others a lower, more enclosed posture. Body proportions and the roads travelled most often explain much of that difference.
Safety and Driver Assistance
Switches for lights, wipers and hazards sit in different places from car to car. Finding them while parked, before setting off, means one less thing to search for once the vehicle is moving.
Multimedia and Connectivity
Charging, calls and music are separate needs. A cable may carry power without sound, and a wireless link can stream audio while the battery still drains, so it helps to know which connections a car provides.