I smoked for about 20 years, starting at age 18.
I can't remember the last time I seriously was tempted to smoke a cigarette but the occasional thought does enter my mind from time to time. It is easy to knock that thought out of my mind now though.
I echo a lot of what the other posters here said, though. I may not crave cigarettes anymore but I know that would change if I lit up and took one puff. I know I would immediately go back to craving another cigarette, then another one, then another one, etc. I know this from previous, much shorter quit attempts that I failed at.
Therefore, I know I cannot take another puff. I'm not sure if my mind is as "normal" as it was when I was 18 (if I was even normal then) but I know that it is NOT normal to inhale nicotine into your body.
Things do get better with time but there is no concrete time frame for every quitter. Each quitter's experience getting back to "normal" varies greatly.