The point is to slowly reduce (like the patch and gum) until you are using "0", so why would anyone want to start at a higher level than needed?
The 24 and 36, etc, were designed to dilute for those who wish to save some coin, not to be used full strength. More flavoring is needed when this is done.
That is only the point if you are using the PV as a cessation device....MANY people are looking for the PV to be an ALTERNATIVE to tobacco products.
I started at 18mg liquid and it wasn't enough to keep me away from the analogs, so I have moved myself up to 24mg and am quite happy here...and I only smoked a pack a day before.
I might step down in the future, but that was not the reason I purchased a PV.
I am going to use my 24mg as often as it takes to keep me off analogs, the rest will sort itself out.