I'd have to say my attitude. Since I was a closet smoker I had to go long intervals without smoking. Also count in my multiple quit attempts...I was not a pleasant person to be around most of the time. Especially during those last years that I smoked, it was one attempt after another. Now I can vape anytime, anywhere, even if it is just a quick puff in the bathroom. And even if I do go hours without I no longer have that "can't breathe, insane craving, going to kill someone if I don't get a cigarette NOW" feeling.
Although the awesome feeling of freedom from a habit I thought I'd never be able to drop is pretty nice as well.
And +1 to meeting new people, some who have become very close friends.
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