I'm a 50/50 guy, just found it the right combination when started vaping, I find to much VG makes me not feel good, but don't like to much of a throat hit either, so 50/50 works best for me.
Right now 45/45/10 distilled water. I usually just mix up a small mason jar of whatever percentages sound good that day. When that's gone I'll try something else. I don't have any sensitivities to any of it or noticed changes in flavor or anything.
I only ever add 100% VG (and 100%VG nic) to my mixes. Some of my flavors contain PG, so probably 90-95% VG and 5-10% PG(flavoring)? The majority of my mixes use organic alcohol based flavors (which I heat and evaporate) so it's very close to 100%VG. I like it because it's smooth. More suitable for high power. I also like the fact that my 0 nic mixes are all natrual and organic!