I've been smoking now for about 5 years. Usually camel lights or malboro lights. I'd estimate I have smoked on average less than one pack per month in that time, but I could be way off. I am not addicted, and I think the key to this is to always be aware of the dangers of addiction, and frequently take time off, some number of weeks, where you don't smoke ANY, partly to prove to yourself that you aren't addicted.

No matter how rarely you smoke, the "buzz" will always be diminishing, there's no avoiding it.