Healthy gamblers are the majority. I wonder if there's something we all have in common that keeps us on the right path and never oversteps our limits.
That thing which we have in common is discipline. Every gambler that can boast of being responsible is very determined and has enough discipline to never break the rules that they set to follow during gambling. If the person is not disciplined, then they can never be a responsible gambler. It's all a matter of personality too and how we individually handle things on our own aside from when we are gambling.