Gambling, drug use, drinking, sex, compulsive shopping, even texting, can all become addictive activities if not checked. Studies have shown that children of alcoholics are more likely to become alcoholics.Stress is a major external factor that can lead to addiction, and the presence of other mental disorders can also increase an individual's likelihood to develop an addiction.Signs of addictive personalities are people who act impulsively, constantly seek new thrills or are considered non-conformists.The fast feedback that occurs in a gambling setting can quickly turn a pastime into a compulsive pursuit of reward, where one can't voluntarily disengage from the activity and harmful consequences occur from losing large amounts of money to disruption of relationships.
Today there is a lot more overlap, with most top players and many at all levels playing both online and live.
Many pros belonged to one group and essentially ignored the other.
You'd hear stories of "live pros" venturing online and not faring well (with some complaining the game wasn't "real" poker).
I know I've started a thread like this before, but it's been a couple years and the topic has come up again not just here on the forums, but on twitter and in real life etc.
There have been those who have suggested another poker "Boom" like the chris moneymaker effect simply cannot happen until more women start to become interested in poker.