I've been vaping unflavored almost from the start. I started with tobacco flavor in my first ecig (the old Safe Cig that looked like an analog), then tried some other flavors once I got into the eGo with refillable cartos. I didn't particularly care for the tobacco flavor all that much, and while I liked the candyish, etc. flavors of other juices, it didn't seem like smoking to me, which was what I was after. I read about someone here trying and liking unflavored, so I gave it a shot, and I've never looked back. Unflavored to me has a slightly sweet taste with a tad bit of a "bite" from the nicotine (sort of like the slight bite or bitterness of Coca Cola, if that makes sense). I've been buying combos of PG and VG nic juice and non-nic PG and VG from RTS Vapes for several years now, but I finally settled on buying PG nic juice, with non-nic VG as the bulk of the juice. I eventually decided I liked VG better (sweetish but not too sweet sort of "caramelly" flavor and huge clouds), so I started using more and more. When I started sub ohming, I decided I needed much less nic, so my mix became like 95% VG and 5% PG. I found this to be a bit thick for good wicking on some devices, so I started adding a touch of distilled water (yes, just from a jug from the grocery store). Right now I make my juice in 100ml batches and have several plastic, needle-tipped 100ml bottles to store it in. My current mix looks like this:
PG 48mg nic: 6ml
VG non-nic: 86ml
distilled H2O: 8ml
This gives me a 3mg/ml mix and decent consistency, though I may drop down to 5% water and see how it goes. I know I could use lower nic and increase the amount of PG, or use straight VG and a somewhat higher mix of water, but I've just gotten used to doing it this way, and I don't want to mess with success.