I voted before I read the question - I put "never", because I've never been addicted, just a very light social smoker of analogs. Virtually never actually crave one if I'm not around anyone else (and usually won't have any with me in that case!), try to avoid buying my own because of the prices in Ontario (~$10 a pack!) and just borrow other peoples when I can, and combustion's probably not the greatest idea because of my asthma, anyways. (I'm quite a fan of smoking nargila/hookah with flavored tobacco picked up overseas, though...)
I work with a lot of much heavier smokers, though, have friends that smoke, family that used to but quit, started again, quit again, and I don't know how long that's going to last. I smoke seldom enough that I find the smell of regular analog smokers disgusting, anyhow. So mostly, I picked up the e-cigs to test them out a bit, before attempting to introduce them to all my friends on smoke breaks at work!
I'm not really the intended "end user" here, so that doesn't count as an "OMFG it's gonna make non-smokers LED up!". Though for each analog I don't bum off a friend, even though it's not often, still less chemicals inhaled. At least if I don't stand too close to them before I get them vaping...