IMHO once people get around trying all the flavors they can imagine, they will come around and "rediscover" the basic flavorless juice.
What's funny is that I just started trying flavorless about a week ago and it was ok but was missing something.
I was thinking Everclear but I just didn't like the idea of alcohol in my juice.
Then I remembered this thread from 2 years back:
http://www.e-cigarette-forum.com/forum/juicyliquid/11541-menthol-crystals.html
Broke out the old menthol crystals I had from the "vaping tacklebox" and voila! my new ADV: Flavorless plus menthol(Err wasn't there an argument before whether "menthol" was a flavor when the FDA banned flavored analogs?).
Anyway, i don't recall menthol crystals being a problem but I remember the discussion about menthol analogs having "fiberglass" that messes up your lungs.
If anyone can chime in that would be great.
Have a great day!
