There is a lot more than just nicotine that hooks people to analogs and the addiction to nicotine and keeping different blood levels (when and how you used analogs) also plays a part. If there were not other factors, a piece of gum or a patch would be winners and everyone that wanted to stop smoking would now be non smokers. This could be a matter of your 'smoking' habits changing as you moved farther away from analogs and they started to change to fit vaping and those changes started to be enough that your body and brain woke up and said 'oops he is not giving us that fix we are used too' even though you were getting enough nicotine.
Vaping, and prescribed nicotine inhalers, work well because they also play to the other factors in a smoking addiction - the mechanical addition, the oral fixation and so on. With vaping you get to keep the same levels of nicotine in your body that it was used to from your analog experience - unlike the patch which feeds a steady amount with no ups and downs or gum which is taken so many times a day but not necessarily in answer to what your body is sued to having in peak and trough levels of nicotine.
Recent reports have started to show that there are other chemicals in analogs that when combined with nicotine during combustion have an additional addicting factor - this probably is what leads some switching to vaping still need a analog or two a day - for that other addition chemical mixture. It probably also explains why those that are finally over the analog addiction and are fully vaping notice that when they get separated from their PV or run out of e-juice for a period of time the nicotine jag is nowhere near what it was back when they smoked analogs and ran out. That. of course, should not be your problem as most people seem to kick the need for the additional chemicals pretty quickly so I doubt those are driving you back.
Since you have done well so long - almost a year - of vaping before tossing away your PV you might want to try some things. First an foremost if you absolutely slip back to some analog use don't beta yourself up - its a hard multiple level addiction to kick and beating yourself up over it makes it worse. And never throw the PV away - any time you can forego the analog for the PV is one time you are being healthier.
I would suspect that pat of this is that somehow your vaping is not mimicking the blood level up and downs you once got from analogs and you might be missing that 'good place' you go when you bump that level up from al lower amount in you blood. This is probably because you can vapin in more places and perhaps more often (if just because it costs less) then when you smoked analogs and have now artificially moved to a more even level of nicotine in your blood then the lows and highs which is a 'fun' and 'satisfying' part of the analog experience.
If you did not smoke much or at all during an 8 hour work day - your body was used to low levels during that time, and the high surge of nic it got when you left work and lit up, and then continued through the evening. If you don't smoke indoors, you body was used to ebbing levels until you stepped outside and tanked it back up. You may have to think through your old behavior and when you would have nicotine highs and lows and mimic that to see if it helps. But don't do it by just moving to higher nicotine levels.
for example you probably want to use 24 mg when you wake up and maybe once more in the morning and then switch to a low nicotine vape (6-18) during the day (if that is when you smoked the least) or treat your PV like you did analogs and don't use the PV until a smoke break time when you can step away from work, etc. Afterwork, zip that level back up with a few 24mg vapes and then go to a lower nic level in the evening if you don't want to withhold vaping like you had to when you would have to go outside.
What all that does is give back to your body/brain the ups and downs of nicotine that it enjoyed and was actually part of your analog addiction. I found all this out because I and several people I know when through the same thing when our vaping went from the same style and analog use to just vaping all day long - a bit here and there - and the blood levels flattened out - even though the nicotine was there the brain wanted ups and downs of it so it acted like it was not getting enough or any at all.
You might very well do much better using less nicotine until the urge becomes great to pick up and analog and then pick up the e-juice with a higher nic level in it to satisfy that urge rather then just using a high nic level around the clock. using the same level around the clock the body can associate that with a 'base' level and at times want it to spike up. Not getting those spikes is why patch and gum users often fail to switch or go back to analogs because they constant level of nicotine they get does not meet the need so they grab an analog or an extra piece of gum, and then start thinking that if they have to use an analog sometimes might as well be all the time and just assume the patch or gum is not giving them enough nicotine.
The other thing to consider is your mechanical use and oral fixation needs. No one, especially men it seems, like to admit that hand to mouth action and playing with an analog was a satisfying part of the addition. The mechanical part of it most people satisfy, unconsciously when vaping, by switching devices around during the day or from day to day, getting involved in re-building or maintenance instead of disposable everything and so on. This is probably why some people don't feel as satisfied with a tank as they do with dripping even though they get the same amount of nicotine .. dripping is a involved mechanical action that a person goes through that alerts the brain to 'nicotine coming' much like handing and lighting a analog. You might notice this if you watch a lot of analog smokers and see some that will actually play with it before even lighting it - production of removing it from the pack, tamping, moving it about in fingers - a bit of a production before lighting it and inhaling for the first time.
The oral fixation aspect which tags on to the whole thing can also wane a bit the longer you vape. As you adjust to your device you may not be using the tip as you did in the beginning like an analog or bringing to your mouth as often and your brain has noticed a more recent change.
There is nothing wrong with your vaping being totally different from how you handled an analog but its just good to know that often that 'urge' for an analog is just because your brain has not trained as fast as your body may have to a replacement of one for the other. You may have to think back on what changes you might have made recently or around the time you wanted to pick the analog back up and analyze if that was enough of a difference that you're now thinking about an analog as an answer.
Just because you feel the need for an analog now and then I would not give up your PV. In the short term if you have to give in while you figure out what works best for you thats better then going back to full time analog use. Everytime you avoid an analog for the nicotine is a time you avoid all the other crap that comes with it and the better off you are.
I hope you can figure it all out, especially given all the time it did work for you completely does say it can and will with a bit of adjustment. Just try and remember that analog addiction has almost a life of its own does not give up easily - thank the tobacco companies for finding a way to hold on to people for years after they initially (or finally) are able to quit.
And to take a suggestion out of another vaper's book on what to do if you feel a really crushing needs for an analog - go watch any vaping video or video's you can find where the video blog vapes on video.. vaping a long with someone seems to help many people for get wanting that analog.
