I've been vaping for coming up to two months. Month one, 24mg. Worked a treat.
Moved up to a variable voltage with a different tank and found the nic hit too much for my vaping habits (I vape a copious amount of liquid on an evening) -soooo- reduced to 18mg last month. One month on 24, changed some gear and dropped to 18 after a month.
I placed an order for some more e-liquid last night and went for 12mg - the 18mg is starting to make me feel sick if I chain vape.
It's like everything though, no two people are the same and want/need different things from vaping. For me, I'll never stop vaping, but I do like the notion of vaping 0% e-liquid, but that's a long term goal for
me.