It's a good question but entirely subjective as people have different needs, tastes and interest with regard to vaping. I personally do not care for higher VG concentration as the flavor is muted and my coils get gunk up rapidly. I also find that higher VG takes away from the throat hit and flavor, though you will get greater clouds. I go with anywhere from 60/40 PG/VG to 80/20 PG/VG. If you do higher PG like I do, please be careful and go gradually since you may have allergies to higher PG or PG in general. I do not but many people do. The most common is 50/50 and it keeps it simple for most people. I suggest you start there and see how it works for you.