The answer, is complicated.
When I smoked cigarettes* I was almost solely a mouth to lungs hitter, because straight to the lungs made me cough.
Paradoxically, When I first started Vaping (Spinner2/Kanger Mini pro 3/ 18mg tobacco flavored 50PG/50VG fluid) doing this was making me choke, but I was OK if I took small drags direct to the lungs.
Then I discovered 100% VG which I tried out with an Itazte VV with a Kanger Aero Mini, and found I could inhale that as deep into my lungs as I wanted, but I have found 100% VG just doesn't make me "Feel like I smoked" which was the appeal right off the bat with 50/50 and allowed me to cut my cigarrette use from 30/day to 15/day on the very first day.
*- I'm going to keep on saying cigarettes, to me only mechanical devices can be analog or digital, and cigarettes may be a method or device for smoking tobacco, it isn't a mechanical device. Besides, while I won't make a big deal out of it, it sounds pretentious and silly to me.
Now, I almost exclusively am doing direct lung inhale on a 25PG/75VG 12mg juice. It fits the bill exactly.