Hey Jim,
I would definitely do the pssgr side windoor/slider again on an ATFP.
In my case, after opening the windoor it provided easy access to the shower hose, remote H2O pump switch, and water tank refill (all located front right pssgr sd).
It also allowed easy access/reach to my dry food storage comp and fridge/freezer/table from the outside.
This was also very convienent and safe for quick roadside stops (snack/drink access,etc...), and allowed for a great outside "under awning" kitchen set-up. It gave us a good side view w/screened ventilation when sitting/eating inside the ATFP (especially in inclimate weather).
The windoor slider also provided ventalation for the pups when traveling.
Our large shepard dog preferred to sleep outside under the awning, and the smaller bull terrier slept inside on top of the bench storage compartments.
Walt