&quot;Why would you want a vehicle that sits idle 90% of the day?&quot;<p>Some reasons I want my own car (note - I don&#x27;t currently own one but rent occasionally) :<p>- My kids&#x27; car seats are already installed and ready to go<p>- My phone is already connected to the sound system, and ready to take calls, with contacts and built-in SatNav already knowing my home and work.<p>- The car has the Accessories I prefer.  Eg, the sound system I want with Bluetooth connectivity, built-in DVD player, seating (leather vs cloth vs vinyl) with the right amount of space and recline movement.<p>- I&#x27;m familiar with all controls. How to set all lighting, interval wipers, and know how to set the climate control, and quickly defog.<p>A uniform fleet addresses the 4th point only. Maybe the 3rd point if my preferences happen to align with the fleet&#x27;s administrators.<p>As a user of ZipCar for quick trips and traditional car rentals for longer trips, these are general points of annoyance for me.