We all have them. Some of us can conquer them --- I successfully quit smoking cold turkey in 1989. Some of us struggle --- I could, to this day, pick up right where I left off with the 2 to 3 pack a day habit.
And then some of us just find a different vice to court... When I worked in TV news, I drank way too much Mountain Dew. I gave that up. And now I get my caffeine from coffee... I guess it's the same vice but a different delivery system. But there's more with coffee.
Part of the attraction is being able to walk into my local Starbucks and not even have to order... I can say "Hi, how are you?" and they know exactly what I drink. It's that five minutes of being treated as someone who is welcome and wanted...
I guess that means I've traded caffeine and cigarettes for coffee and comfort... I think I can live with that.