I quit for the longest of time...(started at 16), all of the sudden I found myself in Colombia, and all the restrictions I've gotten used to (no smoking in public places, etc) where non-existent. Further more, the packing of the cigarettes was still all branded, almost no warnings, and all kinds of 'clicky' flavored types. Don't want a whole pack? no problem, we got you! Buy singles on every corner...
Needless to say I started smoking again... I then quit again for a few years... went to northern Africa, and guess what? People literally smoking at the airport, £1 packs of camel, etc...
I haven't had one in a bit now... People think the restrictions don't work, but they absolutely do.