A couple of things I don't *think* have been mentioned yet (please forgive me if I'm covering old ground here)...
Dragon Fruit.. Holy cow.. Very nice
vape at 15% for you flavor lovers, or 10% for those of you that still have working taste buds.. I didn't try it for a while because I thought it smelled kinda strange. It tastes kind of blueberry-ish but with a subdued kind of kick, if that makes
sense). Closer to the 80% blueberry/20% raspberry mix mentioned earlier. (As an aside, the 80% blueberry/20% raspberry is quite tasty also).
I'm finding the Ripe Banana hard to work with.. Either it overpowers everything else at a moderate % (5% or so), or it recedes into the background at very small % (2% or so). Leaving only a strange (but not entirely unpleasant) "what is that"? kind of flavor.. I've tried mixing it with Ripe Blueberry and Strawberry both. Suggestions welcome.
Mountain Dew.. Another unsung hero.. I bought some Juicy Peach and tried some at 15%.. It had kinda peachy notes to it, but nothing spectacular.. Then I added 5% Mountain Dew and WOW. VERY strong peach flavor with a pleasant fizzy undertone.. I finally settled on 8% Juicy Peach (yes the MD punches up the flavor that much), and 2% Mountain Dew.. Flavor junkies might want to go 10% on the Juicy Peach, but I like the more subtle peach/fizz ratio.
I also tried the Mountain Dew trick on a new bottle of Hawaiian Punch, and it helped give it a different character. But it wasn't as dramatic as mixing it with Juicy Peach. I'm looking forward to trying the Mountain Dew with Dragon Fruit and Strawberry when I get some extra time.
The Gummi Candy flavor finally introduced me to the "perfumy" flavor people talk about when you go overboard with TFA flavors.. 20% Gummi seems to be that mark for me. I have it cut back to 10% now and it seems better, but the Gummi flavor doesn't really dance on my tongue like a chorus line of the little badly-shaped semi-opaque multi-colored teeth destroyers from my childhood. Interesting possibilities as a sweetener for other flavors though. Lots of ideas here.
I still have a half-dozen new flavors to play with.. I'll post again if I think I've found anything moderately interesting.