I started with 36mg for the transition from analogs. after a few weeks into it, I found the throat hit too irritating and dropped down to 24mg. 24mg still seemed a bit rough on the throat too. So when I looked into the difference in the levels of nic on google, I came across a chart that explained 16mg as being the equivalent to regular analogs and 8mg = to light analogs, it made more sense. I used to smoke regs, so I tried 15mg and found that chart made sense because 15mg was quite comfortable for me. Now after almost 3 months into vaping, I'm thinking of going down to 8mg because I'm being told that I'll get better flavor from my e-liquid and I can always just vape the 8mg more often if I want more nic. (what a great excuse to vape more often, lol)