Everything depends and varies from person to person including their favorite games and many more. A gamblers mindset has been to wide a we can't definitely says a person was addicted or not. We were play because of the possible price to won correct me if im wrong but that is how most people think about.
A lot of people are over thinking how a Gamblers mind works and I think there are only some reasons that we can really understand with out thinking very deep about it.
We all know gamblers gamble to win but there are some gamblers that gamble just to escape the reality or maybe to entertain themselves, a past time. The higher the money they can get, the more people are attracted to gamble that is correct, but not all of the time.