OK, I have (must?) to report it.
Now I usually vape 50/50 PG/VG with a bit of flavoring.
Lately I tried some substitutions for PG, such as 8% of rum, bourbon and scotch.
In terms of wicking 8% of alcohol drinks work as good as 50/50 VG/PG.
All of my recipes had interesting (and satisfying)...