I'm brand new to vaping, I tried a sample at a vape shop, a tobacco flavour, 18mg. And found it very hard on my throat, even after one one or two puffs. So I tried a 12 mg , and it was the same,i dont know what the PG/VG levels were.What causes the real harshness, is it the nicotine level, or the PG/VG levels? I'm a very heavy smoker, 50 cigs a day, which costs a fortune, so I HAVE to go to ecigs.,but wonder if I can stand ecigs,after today? I've read that its the pg, which causes the harshness,which I've read may cause it? I was always worried about not getting that blast with ecigs, but I'd love to have something that was less hard on my throat. Is it Nic.levels, or the PG/VG LEVELS? I've read that the VG is easier on your throat? I've seen videos of people vaping with a ton of vapor coming out, but today there was very little vapor, but it still really killed my throat after one or two puffs. Can someone enlighten me?