As to why have an all day vape (ADV), I vape to replace smoking, a simple task. I use a really good variable voltage bottom feeder with 6 ml bottle. Fresh batteries and top off the bottle and I'm good for a full day of fiddle-free vaping, at most I may sometimes nudge the voltage up or down slightly to change the flavor profile and hit. This particular blend is like a vanilla custard in flavor, something I find pleasant but not over powering, haven't had a dead tastebud day in the two years I've stayed with it.
I still also have VV tube PV, another really good one, with carto/tank setup. Batteries are good for a full day, though in that case I carry a single 6ml bottle of eliquid to top it off a couple times during the day. Very good flavor, and that mod takes a beating -- totally trustworthy gear.
There's nothing wrong with running multiple flavors by any means, but life is easy with an ADV
