I have a friend who's smoking history has been littered with multiple-year-long stretches of not smoking. It's like he'd smoke for three or four years at a time, then quit for the next several, then start back up.
Having never successfully quit cigarettes myself, (until e-cigs), I've never been able to understand how or why somebody would go back to smoking after a prolonged time of being off the cigs.
Good for you for getting back off the analogs so fast, though!