Yes absolutely. I didn't mean to imply that this was in any way universal. Coffee may be the second hardest thing for me. I've successfully given it up for a month or more a number of times, getting all the way through withdrawal symptoms where I generally feel happier and more energetic. So far I've always restarted consumption. Not out of a physical/psychological want but because it's so easy, mildly pleasant, and aids focus during work hours.
Everything is "chemicals".
> somewhere over a pack a week was habit forming
Try three packs a day
> I've drank lots,
Probably not, compared with someone (such as me) that does drink lots.
> I've taken to consuming a bottle of red per week ... I also have a couple cups of coffee throughout the day
Careful there!
My point is that different people have wildly different ideas about what is acceptable, damaging and addictive, and their ability to deal with it, in one way or another. I easily managed to give up cigarettes because my girlfriend said she would leave me if I didn't. She gave up alcohol (which she was a heavy user of) when she became pregnant (not by me), which is something I know I will never be able to do.