I'm trying out some Ecopure VG-based flavors now. They do not seem to be as drying as PG, but they are consistently making me sneeze. I haven't seen anybody else mention this, so I'm going to do some comparison testing.
I have both PG (no issues) and VG Ecopure, which not only makes me sneeze a lot as in sneezing fits, but my scottish terrier has been having sneezing fits too. It has to be this vaping since it started when I started vaping. I've been reading that PG offers antibacterial properties (which could possibly ward off infections). VG is a whole different animal, however, and I'm beginning to think maybe I'd be better off going with PG.