Can't speak for anyone else but when I first switched from smoking to vaping I went a little manic (crazy?) accumulating mods (usually clones) and trying all different kinds of toppers, just to see what works best for me. Now, finally, I have pretty much settled down. I gave the majority of the clones away. I have a varsity line-up of mods that I use all the time. Then I have a junior varsity of mods that I put away but keep in the unlikely event one of my star performers goes down.
Varsity: Provari, Silver Bullet, Natural
J/V: Innokin SVD, Maraxus clone, Nemesis clone, King clone.
Juice wise...various brands of some variety of menthol. Mt. Baker is my favorite.
Topper wise I have found that carto-tanks are great for home and when out, I use a protank. No use or time for drippers.