My psychiatrist told me that a person with ADD usually have a “fix”, something that gets the dopamine to rush through his veins, something that calms down the restlessness. Things like tobacco, drugs and alcohol are common fixes but others find their fix in activities where they can hyper focus. If not controlled, they can get obsessed with such activities to a point where they dedicate all their time to them. It can affect their relationships and /or other necessary (boring) activities. I have tried tobacco, drugs and alcohol but they did not do it for me. My fixes are sex and video games.
What is yours?