I thought I was beyond the PG sensitivity. Alas, after consistently
vaping as low as 20PG for long periods of time, my throat started to feel the repercussions.
I have a list of all VG flavorings floating about these forums. I'm going to start utilizing it, along with playing around with diluting VG with distilled water.
Onto the topic: Most of my flavors are PG based, but I feel like I get good flavor with 5% on most flavorings. Only you will know how much is necessary for you.