Well...can you ever really quit? I know people who quit smoking over a decade ago, who are still afraid of smoking a single cigarette, because they know they'll be right back where they were when they quit. I know people who quit for years, and did just that. They all say the cravings go away, but they're always there, lurking under the surface.
I was a 3PPD smoker, and smoked for decades. I'm not even a little bit tempted to go back to smoking. I've been off the cigs for over 2 years. (Date in my sig-line.)
Once I got off the cigs, I would have some small "I'd like a cig" feelings, nothing major, from time to time, for about six months. Then one night, I left the house without my PV, and was a long way across town before I realized it. I still had an unopened pack of cigs in my truck, and that night, due to not having my PV, I opened those and smoked 3 or 4 of them. But I hated them. They were just plain nasty. I was honestly shocked, even though I'd been told "Once you've been vaping awhile, you'll hate cigs".
When I got home later that night, a friend was here, and I bummed a cig. The pack I'd had in my car had been there for at least six months, mostly during summer heat, so I figured it was pretty stale. I bummed one from him so I could try a fresh one. It was just as bad. I couldn't even convince myself to finish it, now that I had my PV (and therefore, nicotine) available.
Since then, on the (very few) occasions I've even briefly thought about having a cig, I just remember how bad that last one tasted.
In the meantime, I've cut down on nicotine, slowly, and now I'm nic free.
I'm sure that I'll never be a smoker again.
For anyone who is having trouble getting off the cigs, my advice is that it's OK to smoke a few here and there, just keep your goal in mind. Count the ones you *don't* smoke, not the ones you do. And get the right juice. If you don't have enough nic, or if you have too much nic, or if you don't like the flavor, then it's not going to work as well. If nothing else seems to be working, check into WTA juice. I have never tried it, but that's the trick for some people. (For me, I simply needed a higher nic level than I started with, and once I raised the nic, it was easy.)
One last piece of advice - you need backups for everything. You need more than one tank, and you need replacement atomizers for your tanks. You need more than one battery, and you can't run out of juice, and you need a back-up charger, and you need another charger designed to plug into a cars cig-lighter outlet because who know, a storm could knock out your electricity for a couple of days. With smoking, pretty much any grocery store or gas station would sell cigarettes, so they were easily available 24 hours a day. With vaping, at least in most places, it's not that easy, and if you lose your PV, or your only charger quits working, you'll be tempted to pick up a pack of cigs. (I go out dancing a lot, and I leave my PV sitting on my table while I dance. But I have a backup PV in the truck, just in case someone walks off with it. An extra battery, tank, juice, everything I might need if the whole darn thing disappears is in my "vaping purse" in the truck.)