I've been mixing a watermelon PG liquid with a spearmint VG liquid 40-60 (pg-VG). Holy lord, it tastes amazing. The sour refreshing flavor of the pg hidden behind the cooling flavor of spearmint; while still creating a ton of vapor. It's all personal preference. E liquid will never taste the same for two people, so just base it off of personal flavor and cloud production/denseness. Don't be afraid to buy 10ml bottles until you find "the one", as well.