Everybody coughs at first. But 100% PG juice lets through the most harshness of nicotine, the most TH, and also the most flavor. VG dulls all of those things and adds more vapor. Some nice ratios are 70pg/30vg and 50/50. FreedomSmokeUSA has their juices in two groups, Specialty flavors which are only in 50/50, and Flavor Range flavors which are available is whatever PG/VG you select, and Samples BTW are just some of their liquids as 50/50 and 24mg only. Backwoods Brew is 70pg/30vg. Velvet Vapors are available in PG, VG, or one mystery PG/VG "Velvet" blend. I recommend you not buy a huge bottle of any eliquid until you try it. And there are many many more juice vendors.