Well, for a change, i'm gonna confirm what our dear goddess is saying about drinking more coffee, it happened to me too.
The first 3-4 weeks of me quitting the analogs i was
heavily 
vaping on 20-24mg ecopure VG liquid, drinking lots and lots of water. E.T.C. I was also getting sort of 'high' from consuming lots of stimulating coffee and nicotine without the 'lethargy' caused by smoking and inhaling CO2, CO and all the other chemical toxins found in analogs. That and the fact that my body was finally starting to heal from a ten+ year of smoking poisonous tobacco i suppose.
It was only after a week, 5th week after quit date, that i started to significantly reduce the amount of nicotine to a fraction of what i had before..... Now that felt like quitting all over again....
Anyways, i am well into 6th week now, and my coffee consumption seems to have gone down, without so much of a hassle from me too. Seems like i just don't need that much anymore, and i really should, since i have been a heavy coffee drinker for far too long. I also notice that i don't crave sweets that much too, sugar is also a reason sometimes ppl crave for coffee when all they really need is the sugar it contains.
I then notice what it says in the nicorette gum pack instructions i have where it refers to changes in other drugs dosage because of quitting nicotine :
may need reducing of dosage blah ... blah ...blah...caffeine ... blah...blah...blah
possible mechanism : lift of stopping of liver enzymes metabolites because of quitting smoking... (or something along those lines).
It then hit me,
i don't need that much coffee to have the same effects from caffeine than i did while i was a 2.5 pack a day chain smoker.
I dunno, i could be wrong and it was all willpower on my part or something, but i highly doubt it. A phd student - graduate on pharmacokinetics or a similar discipline should be able to confirm if what i am saying is true though, now that would be interesting
