Nice thread folks. Enjoyed every post. (Yes, really, every single post.)
I just stumbled here because, frankly, this sub-forum holds no interest for me.
I like finding out that others reuse their Humco bottles for other things too.
A thought about VG and sweetness. As we know, many mixes contain some type of sweetener even if it is very slight. (Like a few drops of Burley Tobacco as an example of very slight sweetness in a mix.) I believe it is the feel of VG that contributes to transfering that taste to the brain. Much like we expect syrup to be sweet, or a cola type soft drink, the feeling, or texture, has a huge impact on perception. The feel, or texture, of PG does not have the same impact on sweetness.
Now I may be wrong and it may be that VG helps the nerves detect sweetness better?
I do know that when vaped straight PG has a slight sweetness almost/kinda metal taste. (Not the copper/fish taste of some nic's.) While VG reminds me more of a very clear olive oil. But when combined with flavoring, a higher VG makes my sweeter mixes work better while higher PG makes my bitter mixes work better.
I'll leave the experts to hash out the rest.