Both your vaping styles and gear are way different than mine, so I think our comparing notes is mostly like comparing apples to oranges. Your MTL vs my DLH; your much higher PG base than my 80VG/20PG or 100% VG bases (PG generally carries the flavor better than VG does); using verses not using nicotine; and a wide difference between the gear/builds you use compared to mine. So what works for you would never work for me, and I assume vice versa.
I have no experience with there being a
big difference in a recipe...made for/by someone who does MTL vs. DTL, no nic vs. with nic, low wattage vs. high wattage, nor with various gear and builds. Another ECF member and I commonly use nearly the identical % of flavorings in eliquid recipes that we both make. He makes his DIY at 80VG/20PG @ 3mg and I make mine 60VG/40PG @ 7mg. However, he
vapes the exact opposite as I do in every way. He vapes only DTL, at
very high watts, and with fancy coils he builds at like 0.2ohms and lower. His gear includes things like a Hammer of God beast size mod and mods he builds himself, with the Voltrove (IIRC 20-24mL capacity) and similar others.
I make eliquids for a couple friends and a relative, who also have differences in how they vape, the gear they use, their nic mg, PG/VG ratios, etc., compared to me. They all like the same recipe made
for them, flavoring-wise, as I make it for myself...with only the adjustments made for their different nic mg and PG/VG ratios.
It's just a new-to-me idea...that "what works for you would
never work for me, and I assume vice versa." Not saying it's not true in your case though. Just something I'd never heard before.