mg and cig strength aren't necessarily correlated. A lot depends on how susceptible one is to nic fitting over a small change in nicotine, and individual smoking and vaping habits. A 2 PAD ultralight smoker very susceptible to feeling any decrease in blood levels of nic will not be satisfied by low mg vaping if they don't vape constantly.
In doing research (and extrapolation since I was a RYO) I found many ultralight smokers who needed higher levels, and many full flavor smokers satisfied with low mg nic.
I would think that if one is trying to quit smoking now, erring on the too high side would be best. If it's too high, you'll know immediately cuz it'll make you dizzy and sick. If it's too low, you'll suffer along until you break and smoke. If one wants to smoke while learning to vape, then erring on the low side would seem appropriate, stepping it up until no chemical induced cravings are present (social and habit cravings may still be there, such as a smoking partner etc). A middle approach would be to start with the 16's and see. It seems most former smokers can adjust their vaping frequency to make 16 mg work. It's not likely to cause physical effects immediately, and even heavy smokers can be satiated with chain vaping. I took this approach and found that while I could probably hold out with it, some 24mg for some occasions are very helpful.
But everybody appears to be different and I was unable to discern a formula to determine the ideal nic strength simply from what and how much one smoked.
On flavors, I will say that I'm quickly realizing that as much as I thought I liked it, I hate the taste of cigarettes. A true cigarette taste might have been helpful to me for the first 48 hours, but after that it held less and less appeal to me. I've also found I kinda like menthol vapes even though I grew to despise menthol cigarettes about 12 years ago. Surprising indeed. In fact, for the last few days I've been mixing in a mint/menthol juice with tobacco flavors and liking it quite a bit...