TAZ--
Congratulations that you quit and have been able to stay smoke free. Yes, I think if most of us saw lung cancer in one of our loved ones, it would definitely have a profound effect on us, and probably would make it easier for most of us to give it up too.
I'm sorry you lost your Dad to cancer, and it's a shame that it happens as it's so preventable. Your dad must have been so proud of you for quitting.