I find I have to go below 3 MG if I am using a seriously cloud chucking setup. I just can't cope with as much nic as I used to use.I agree completely with that. I started out at 12 and I'm now at 3 without any discernible side effects other than initially when I stepped down I do vape more but it evens out after a week or less. I think that I am addicted more to the action of vaping then I am the nicotine and I came to that conclusion when I realized I was vaping a zero nicotine e-juice for two days without realizing it. It couldn't quite figure out why I was feeling a little bit edgy and had a bit of a headache going on but other than that I was relatively okay. Not so okay that I kept on with it but okay enough that I didn't kill anyone LOL