Smoker here
Started when I was 16, I am 34 now. Quit twice during that time, once for 6mos, the other for about 2mos. Presently smoking as we speak. But the first time I quit, I was miserable for about 2weeks, then it seemed to get better. Obviously it didn't take. Unfortunately, I still really enjoy my smokes, especially with a nice 12 year old scotch or an ice-age port, but I digress.
I don't believe the cravings/nostalgia/whatever you want to call it ever go away for anyone who has been a smoker. A good friend of mine's father has not smoked for about 30 years and he still tells me he gets cravings, so having said that - once a smoker, always a smoker. Even if you have successfully quit, it will stay with you forever in some form or fashion.
Keep it up, man, good on you and good luck!
(and PLEASE don't become one of those "ex-smokers" you so fondly referred to)
Embrace your enemy, for he is not - he is just confused.
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"It is very hard to unleash the dragon and then put it back in the box without being devoured in the process."
-Sifu Abel