I use VG only since PG irritates my throat and mouth. If it was a lot less than what it is for me, I would call it a TH. The PG TH is just low-level irritation. I prefer the TH to be nic only. Flavors with VG juices can be brought out by adding a little alcohol to the juice, or distilled water works, although less so. VG juices do need to be thinned. PG is thinner.
There is no best, just what is best for you.