Shifting addictions vs. shutting them down

I have an addictive personality. This might be inherited - after all, my father was a raging alcoholic - but then, my sister doesn't seem to have this issue... for me though, addictions are part of life. I'm all-or-nothing, fully in or fully out; in fact, I recently mentioned this to a friend and she pointed out (perceptively, which makes sense as she's a psychotherapist) that even my issues with…