Bill - I smoked about 1.5 packs a day from 18-22 or so, not a long time I guess - but I never had a problem "quitting." My wife didn't like it (before we were married), so I cut way back. I effectively stopped for about 6 months - no smoking - but when I started playing in a band again, and the guys smoke, I have a few during practice. We were gone for almost a month on vacation, and I didn't have a smoke or any "cravings." I guess I'm lucky in that aspect - I'm the same with alcohol - I've had months where I drank 4 or 5 days a week, followed by months were I didn't have a drop.

Having kids and a family really make "quitting" easier though, I think - it makes a person a little less "selfish," at least it did for me...