I smoked lights and ultra lights 10 a day. I started with 12mg didn't do anything then 18 I was still craving till I tried 24 and only till I used 24 on a rda. Yes 24 on a rda and subohm tank I was finally satisfied and kicked the analogs. Many stared when I used 24 on rda but that's what I liked. recently moved down to 18 no problems. Tried 12 and its too weak. Also I vape every damn chance I get Prob few pulls every 10 to 30 minutes. Looks like I've cut out the analogs but massively increased my nic consumption/addiction. Hoping to get to 6mg someday.