Like others, I don't preach to those who don't ask about it, however, I am happy to give witness to the wonders of vaping to anyone who does ask.
In fact, it happened just today. I was in the car in the parking lot of the laundromat where I had just dropped off my son to do his laundry since his car broke down. I was waiting for him to get done and happily vaping while I read a bit, and a guy who had just parked a few spaces away (no other cars around) asked loudly if I liked those and if they worked. I happily told him I loved them and yes they did. He said a co-worker where he worked just got one, and seemed to like it, but he was still on the fence. I went ahead and told him that while the gas station cigalike varieties may help a bit, if he really wanted a good start he should look into some of the better starter types such as the ego, which is what I had with me. He asked about where to get them, and I told him of the one vape shop around the area that carried them and higher end equipment, although expensive, and also suggested he look at some of the places (I named a few) online where he could find a good selection. I also told him about the forum here, so maybe he'll drop in. He seemed genuinely interested.
I've had lots of times like that, some less specific, just general stuff, and some more in-depth. I'll get as into it as the other person seems to want. No one likes to be preached at, so if someone else isn't interested, or only asks general questions, I tend to let them lead the way.