The level of saline the DIY experts recommend does not add a salty flavor. It does impact the "feel" of the vape...
The one variable I haven't seen mentioned is ensuring exceptional wicking. There's a huge difference between say an original Protank kind of hit - where the liquids fighting through thick wicking to get to the coil, and a more modern dripper hit (or a bottom feeder) - where the coil can be effectively "swamped" with liquid for every draw.
I feel like those dripper/squonker hits feel "wetter"...
I don't do very very low resistance, or very very open airy atomizers, because I like that swampy, thicker vapor...