While both PG and VG produce vapor, both are used for different purpose. PG approximates the "throat hit" that vapers come to expect in simulating their smoking experience. It produces moderate vapor. VG does not provide this throat hit, however, produces voluminous clouds of vapor and increases the volume feeling in the lungs. We generally recommend a 70%/30% mixture of both for optimal throat hit and vapor production.
However, if you lean more towards wanting that throat hit maybe even a lesser amount of VG might be wise.
Without our e-liquids, the amount of VG we are able to add also depends on the milligram strength you order. Because the nicotine base takes up a certain amount of room as does flavoring, the higher the nicotine content, the less room we have to add VG.
Example:
At 12mg, we're able to add 35% VG (possibly more)
At 24mg, 35% VG
At 36mg, 20% VG
At 48mg, only 10%