It looks like this study is focused on drug addiction which on its own is really intriguing, but I wonder if there would be any evidence in the human genome to predict behavioral addiction.
Alcohol ruins your day.
I can be productive on weed and/or caffeine. Both of them get work done.
I believe I'm addicted to the productivity, when I take them outside of a work environment, I want to work.
At what point is this positive reinforced habits?
Addiction really has a lot to do with making bad decisions in your life to keep doing the addictive behaviour.
If its not negatively impacting your life, and it's not interfering with relationships and obligations, you're not addicted.
People can be addicted to lots of good things.