My days off, I filled my 3.5 mL tank at least 5 times.
Wow! 17.5mL or more. I think that's the record of what I've seen so far for mL of juice vaped in a day.
I tried to "vape like I smoked" when I first started vaping - out of habit, mainly. I had been delivering nicotine into my body 10-12 puffs at a time, 30 times per day for 30 years. Then, when I started really paying attention to how much and how often I vaped, I quickly realized that I could simply take 2 or 3 puffs, lay it down, then a few minutes later take a few more puffs, etc. Doing that with analogs would be somewhat of a waste. Even if you never abandoned your part-smoked analog sitting in an ashtray, It still wastes some of the analog's content each time you crush it out and then relight it, not to mention there's a not-so-pleasant taste when lighting an analog with a burnt end rather than a fresh one.
So here's how I vape: I always have my G6 out and laying on my desk at home, or on whichever table I'm at throughout the day. I pick it up every few minutes and vape anywhere from 2 to 5 puffs, then I put it down again. I have one manual Halo G6 78mm 280mAh battery and two automatics with the same specs. I had just (in the past week) bought the manual because I keep hearing people say it gives much better control. And I'm sure it would for me too, even though I haven't fully mastered it yet. But I keep coming back to the automatics. I'm beginning to accept the fact that I simply prefer suction-switch batteries on a cigalike over finding the button every time.
A lot of the reason lies in how I like to hold my e-cig. I hold it like a cigar, resting on my thumb and middle finger of whichever hand it's in, with the index finger arched over the top of the battery just below the threshold between the battery and carto. I can't maintain this hold when I have to press a button at the top of the battery, even though the button is continually right next to a finger. And even though it is - for most people - easier in the fact that a manual battery requires no priming puff, I actually LIKE to do one or two priming puffs before each drag when I vape.
So yes, I'm a weirdo who prefers automatic batteries on his cigalike.

When I get a VV APV setup, I'm sure I'll prefer the manual battery (even if autos were often available for APVs, which they are not, of course). From what I understand, APVs (especially when they include a VV battery) are all about having the ultimate control over your vaping experience. I'll be down with that, especially since (1) the button is much bigger on most of the larger APVs, and therefore easier to utilize, and (2) I'll probably end up holding the APV differently than I hold my G6.
Oh, and
what I like to vape is (around 98% of the time) my current favorite e-liquid mix from Halo, a 9:1 ratio of Menthol ICE and SubZero, which I call "Freezing Rain". The other 2% of the time I'll stray to another flavor. I've still got several flavors sitting in my vaping box from when I ordered the menthol sampler pack from Halo. Sometimes it's Mystic, sometimes it's Kringle's Curse, and occasionally it'll be straight SubZero, especially if my sinuses are congested. (One puff of SZ and I'm breathing easy again, no matter how clogged up I get.) I began on 24mg/mL nico, but have dropped down to 21, and intend to get to 18 in the near future.