I have been a smoker on and off for about 9 years now (wow, i'd never calculated how long i'd been smoking before)
There have been times that I've quit for a few weeks if I've been ill or for other reasons (usually if I'm seeing a girl who is a non smoker)
More recently though, I figured that if I can quite easily go without for a week when I'm ill, then surely I could extend that and give up completely.
I've never really enjoyed smoking, but once it becomes a habit, its not as easy to stop, but I've managed it. I stopped on september 1st so I've been smoke free for 33 days.
I feel so much better for it too, clearer lungs and not constantly coughing.
Good luck to anyone else thinking about quitting, it really will benefit you in the long run!