I would have to agree with the OP that you will likely increase your nicotine intake initially when switching to PV's. I got a Volcano with 8mg Cartridges and even though I got the lowest strength of nicotine available, the first cpl puffs on my PV gave me a nice nicotine buzz. Also, because your new toy is so much fun to play with you'll likely want to smoke even more than you would with analogs. BTW, I used to smoke approx 5 Camel Light 100's a day, smoking half a ciggy at a time and finishing the rest later.
On a slightly off-topic note, I've been very pleased with my standard issue Volcano. I read a good bit on this forum and around the web prior to it arriving. I've not experienced any of the usual complaints people have about the L88B series. However, I am a light smoker. So I'm pretty sure that has a lot to do with it. I'm also thrilled to state that since it arrived last week I've smoked only half a cigarette. Last night I took the rest and gave them to a family member to stash away, just in case, lol.
To those STILL reading AND considering buying their first PV, I'd reccomend getting some 0mg nicotine juice/carts with your order. That way you can play with your PV a whole lot when you get it, without drastically increasing your nicotine intake or getting sick. I'd also reccomend a Tobacco flavor, as the occasional urge to step outside creeps up. I like my fruity flavors, pineapple and watermelon especially. However, when trying to simulate an analog I'm thinking a little tobacco flavor would go a long way.
Of course, because of the aforementioned mistakes I made on my initial order, I now have a great excuse to place another order, lol. So maybe you should keep that in mind!
Anyway, hope this post has been as informative to read as it was fun to write!
-Danyulc