Moot point 'cos I gave up after smoking for just under fifteen years without breaks.
To be honest the anti-smoking propaganda, or perhaps more the manner in which smokers are treated in modern society, probably kept me smoking for an extra two or three years, out of sheer pig-headedness (a quality which is very useful when you do finally quit).
Originally, smoked Marlboro (Red - still the best, if a little heavy) for a few years then went onto the Silk Cuts. Switched to an Italian brand called MS about five years ago (quite nice and they cost me half the the price of Irish ciggies).
Finally started to wind down onto Silk Cut Ultra about a year and a half ago, and almost two months ago, I just stopped - Smoking wasn't fun any more. So far so good.