Think it depends both on personal preference and particular flavors. I don't like a lot of throat hit myself, and prefer a smooth vape with big thick clouds, so I'm tend to prefer 50/50 up to 70/30 depending on the juice. I think some flavors are well suited to have a bit of an edge from the PV and others should just be mellow, smooth and creamy so I go for 50/50. I haven't tried any 100% vg or pg either though.
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