I use 95%VG and 5%H2O. I know the percentage because I mix it myself. I found 80%PG pre-mixed juice to be way too harsh and over-flavored so I went way overboard to the VG side and found I liked it a lot more. VG is not harsh and makes more vapor than PG. I don't do lung hits all that often. Most of my vaping is in through the mouth and throat and out through the nose. The only flavor I get is from the VG and the nicotine which is what I like.