Hmmm....you do not really think those mass marketed 'Suicide Bunny' type things have somebody painstakingly crafting a recipe do you? I read a want ad on craigslist in CA for someone that knew how to mix ejuice. There is not a chef behind much of any of that stuff.
BTW I think you are thinking of MBV with the xtra flavor shots
i think with the "good" juices that taste great, sure. I wouldn't call them a chef in the literal sense but someone who has done the guess work, had a theoretical vision/idea for a particular vape, and tried to achieve a goal. I don't think I'd rank Suicide Bunnies at the top, but I'm sure there was a ton of test batches that didn't quite measure up, just like brewing a "craft" beer.
Jen, I would have the third topic be pleasure. Even when you "feed the monkey" with regular cigarettes, some amount of pleasure is derived. It's unavoidable. It releases endorphins. You can't not enjoy it on some level.
vaping has expanded that pleasure and took it to a whole different level. Certain juices are like a culmination of flavors you've never had the opportunity to experience. Certain vapes are so complex that you get something a little different each time.
Pleasure is also derived from feeling like a kid at Christmas waiting for vape mail. You stalk the mailman. You open a gift (to yourself usually) and you usually enjoy it.