In university I used to bum cigarettes off people all the time and have one here and there, esp back when you could smoke at the club, at a rave, etc. before bylaws. I'd even buy a pack of cigarettes here and there, and then just...forget about them and never finish them. Sometimes I'd have a bit of a craving for two or three days after and just power through it, and that was that.
In the summer I'll smoke some pipe tobacco, and every few years smoke a cigar. Don't really crave after.
Before my older sister was born my father was a heavy smoker. When my mom got pregnant, he just quit, and that was that, never ever showed any interest in smoking again.
But then I've seen the very brutal suffering that I saw friends go through trying to quite their smoking habit. Just awful.
All said, I don't think nicotine is a wise thing to mess with. Vaping especially to me seems like a slippery slope because it kind of gives the vibe of a kind of "consequence-less" interaction with the drug. If you smoke a pipe or cigar, you stink, you might get a headache, and it actually costs quite a bit of $$. Vaping is set up to seem like this casual entertainment with few consequences. I'm glad my teens have so far ridiculed it and shown no interest.