A few reasons in my case and, no, it doesn't take me 10 minutes to park and, no, it doesn't take me 10 points to position a vehicle into a spot.
1. Most of my vehicles have a very low ride height in the front and I want the the vehicle to be parked as much away from the traffic as possible. In the case of the truck, the rear has more overhang then the front, so when parked with tail-end in, the front end is positioned at the most distance away from traffic; granted that there was a parking stop and not just an open spot.
2. For my job, I drive a panel van for a good part. While it has a reverse-view camera, it covers very little of the view of the cross traffic; it covers mostly, well, rear view. When I back the van up into a spot, I don't need to worry about the non-existent cross traffic and when it's time to depart, it is easier and quicker thus safety and speed are preserved.
3. Again, related to my job, I want a clear and direct escape path in front of the van at all times. Unless it's an open, pull-through spot belonging to double-row parking arrangement, the van will always be backed up into a spot.
4. Rear-steering has more maneuverability. In a tight parking lot with single rows, I much prefer backing up any vehicle into a spot.
The most important thing is because very much so I want to be THE JACKASS car enthusiast showing off my driving skills by backing up into a parking spot in one sweep.
Ever been to CC&C or any car-related events? Those fucking jackasses ...