Comfort and Convenience
Cabin temperature is a good example of how personal comfort can be: one person wants warm air early on a cold morning, another prefers a cooler cabin throughout, and neither preference is wrong.
Safety and Driver Assistance
Anything worth adjusting is best adjusted before moving: mirror angles, seat position, wiper and light switches. Sorting these in a stationary car means the first roundabout is not also the moment of discovery.
Multimedia and Connectivity
Battery level matters on a commute that bookends a working day, so if a charging point is available it is worth using on the outbound trip rather than waiting until the evening return.