Yes, I've often felt like my trip from "heavy smoker" to "vaper" has been a sort of religious experience, in that I want to tell people about it. I often call my PV my "pocket sized miracle" or similar. I want to help smokers find their way to vaping, because it's been so good for me.
I go out two-stepping (country dancing) fairly often, and I vape in the bars. It's pretty common around here now, so not many ask, but when I first started, it wasn't nearly as well known, and people asked all the time. I was (and still am) happy to explain. I also vape in restaurants (though I usually go in the mid-afternoon and sit in a corner away from other people.)
Since I got off the cigs, I've carried business cards for local vape shops. In the past, I would often stop where someone was standing outside smoking, show them my PV, answer questions if they seemed interested, and give them business cards. I like to give them cards for two or three shops, and tell them that I don't work for any of those, I'm just an incredibly satisfied user who feels it's been a huge benefit to me. Most of the vape shops would give me a credit on my next purchase if a new person came in, bought a starter kit, and gave my name. I don't even write my name on the cards or tell the people who I am. I'm not doing it for financial reasons, and I don't want them thinking "He works for the shop" or "He gets a cut if I spend money" or anything similar.
When I first started, answering questions was an almost-every-day kind of thing. Now, there are a ton of vape shops around, and a lot more vapers, so most people are already at least a little bit familiar. It doesn't come up as much, and the discussion is likely much faster when they say "Yeah, I've heard about those" or similar.