Congrats too all those who quit, and good luck to those trying.
Smoking is a terrible habit that I've had the fortune of not being trapped in. I've lived around smokers all my life which is what kept me from starting. Its dirty, nasty, expensive, and the list goes on.
My previous supervisor at work retired in August in fairly good health considering he'd smoked all his life. He died a couple weeks ago unexpectedly. He was about 60, and his death was most certainly a result of smoking all his life.
If you can, kick the habit now before its too late.