I like the variety of angles on the question in this thread. My angle -
Quit smoking and started vaping over a year ago. I still don't know how or why it happened. A colleague gave me a try on his PV. Soon as my own arrived in the post, that was it for the cigs. Never even wanted one since. Started off on 12mg liquid. Just switched to 6mg about a month ago, and it doesn't seem to be a problem. I might experiment with 0mg at some point, but it's not a big issue in my mind. Giving up vaping is not even a plan at the moment.
The only thing I'm trying to do is to vape more like a smoker - because it's possible to vape pretty much anywhere (here in Scotland), I find I can too easily vape constantly. And I don't enjoy that; it takes my attention off what's happening around me, and doesn't give me the satisfaction of "something different" that an analog cigarette gives you: the waiting, the decision to have one, the going outside or away from people, the rolling and lighting up, and then the definite end to the cigarette. I find that I enjoy vaping more if I treat it a bit like that, as a special time-out treat.
I've had lots of people ask me when I'm going to "give up properly". I shrug and say, deliberately casually, "dunno... might do some time... might never"; and then respond to their sometimes shocked expression by explaining all the science about the health risks of vaping vs. smoking. They sometimes still don't "get it"; but any chance to put some facts out there is to be leapt at. If they don't "get it" that it's all about enjoyment, not addiction, there's not much I can do to change their mind. (Enjoyment vs addiction, in terms of my personal choice, is why I'm making efforts to not vape constantly: for me, having to vape all the time feels like addiction - vaping at intervals feels like enjoyment).