I don't see how you could be an "occasional" smoker, smoking every x number of weeks or months, because the feeling you like from smoking comes after you have already smoked regularly for a while, I forgot what it's called, but I know that if you stop smoking for 2 or 3 days, and then smoke again, it won't feel good like before, and you will have to keep smoking regularly to get the feeling back. I have done this several times, to stop smoking for days or weeks, and this always happened to me.