I almost feel I should have started off with 36mg. I may have noticed being nic'd up in the beginning (but I was also smoking 5-8 cigs a day back then). I vape 24mg juice all the time till before going to sleep. When people who vape ask me what level my Nic is they are surprised when I tell them.
I used to smoke Dumaurier Lights (when I lived in Toronto) and camel 99 since I have lived in the states (nov 1998). I'm not really planning on lowering it any time soon either.