Well there's the key slip.....it doesn't cause a problem in your life. It sure did in mine.....tons of times I'd swear I was going to stop and couldn't'; getting fired from jobs for being UGLY-ASS hungover etc etc....

I think you are right though about some addictions being pluses in life and not minuses (gardening, or really whatever grabs you) but it could be considered a problem if say....you didn't make it to work because you just couldn't stop trimming your azealas or something.