Whatever works best for you. If you like high PG juice, get pg nic. If you go high VG, then get vg nic. If you go 50/50 then perhaps 50/50 nic will work for you.
I ended up stocking up on 100% VG nic as PG dehydrates me to no end, so I have been dropping PG levels as much as I can. VG nic...