Currently I am vaping 18mg nic of LibertyFlights Highway 100% VG in a J-tank. It's actually pretty good, most tolerable liquid I have had yet (out of almost 30 samples so far). It is slightly nutty with a bit of smokeyness to it, overall very unoffensive and smooth that I can vape at any time of the day. And being 100% VG it produces amazingly thick clouds of vapor (which is very fun to watch linger in the air in my apartment, I will admit!).
So far this has been the best liquid I have tried, although I would prefer to buy USA made liquids with better quality control, as this Chinese stuff has me very worried. But so far none of the USA vendors have had any decent liquids. I have a Halo variety sample pack showing up next week, and I hope that will come through for me, as I don't want to be stuck vaping Chinese liquids that could potentially have some seriously toxic stuff in them.