Oh man, quitting was so hard. For two years afterwards I still wanted one. Hell - I wanted one just a few months ago, and it has been over four years since I gave it up. And I only smoked for 2...It is one hell of an addiction. The only addiction I have had worse than that is caffeine. But caffeine won't kill ya fortunately.
The good news is we types who get addicted to stuff are less likely to get Parkinson's - our dopamine connections are just too f**king strong.
I think one thing that helped me quit was to start doing cardio exercise - once I started getting in better shape, I didn't want to mess it up by smoking. Anyway - good luck to those of you trying to quit.