I started out slow and I think that was because I wasn't using enough liquid. I was left wanting more--more of what, I wasn't sure but knew I was not content with being off analogs and vaping in general. I was also not getting enough nicotine so I upped the ante. Now I'm dripping 48 mg on my atty and it looks like I'm vaping about 10 ml of 48 mg in ten days. I wouldn't care if I vaped 30 ml a week, so long as I get my "fix", I'm off cigs and I'm a happy camper. I have all my bases covered at home/office with my passthru, out in the car with a passthrough adapter, lots o' batteries and various chargers. I think I do most of my vaping at the computer and in the car. I carry a complete and loaded 510 on a lanyard but seldom do I ever dip into it.
I do think it's important not to compare your own usage with others. Each of us had completely different smoking habits, so each of us is going to vape differently as well. Hell, if I'd known just getting nicotine was enough to keep me happy off cigs, I'd have rigged up an IV at my desk.