One study I read concluded that quitting nicotine was more difficult than some more "hardcore" drugs. I used the patch to quite smoking, now the darn things piss me off and I can't even be in the same room when someone is smoking. I can't do bars anymore because of the smoke, not that I go to them anymore anyway.
I know what you mean Jeeps. My dad smoked all the years I lived at home and it never bothered me. Once I quit though, I cannot stand being around second hand smoke. I'm glad you quit man.