Reverse Shifting Pattern

The conventional motorcycle gear shifting pattern is as follows:
[neutral] -down- [1st gear] -up- [2nd gear] -up- [3rd gear] -up- [4th gear] -up- [5th gear] -up- [6th gear]

The reverse shifting pattern is as the name suggests reverse that of the above:
[neutral] -up- [1st gear] -down- [2nd gear] -down- [3rd gear] -down- [4th gear] -down- [5th gear] -down- [6th gear]

So what's the rationale behind this shifting pattern? Why do I choose to swap to this afterall the conventional way of shifting is so drilled in to the muscle reflex.

1. The engagement of the gears feel more natural, when stepping down to shift up the gear, the gears click in much easier.

2. The stepping down motion is more natural to the human ergonomics. It's always a bit awkward no matter how seasoned we are to do the nudge up motion rapidly.

3. When leaned over in a left corner, up shifts are much easier as the left foot will not be wedged in the tight space between the lever and the ground (as it is now on top of the lever for the upshift).

There's a general rule to follow this form of shifting:

"Head Down - Shift Down, Head Up - Shift Up"

Head down when trying to go fast so shift down (to shift to a higher gear)
Head up when slowing down so shift up (to shift to a lower gear)