Sometimes I just think that when you say responsible gambler, you don't do things that a gambler shouldn't do. Is not gambling good enough to be considered a responsible gambler?
A thought that sometimes confuses me too is: if you can be considered a responsible gambler, do you have a limit on the amount you gamble? even though you know you always lose at gambling?
If you are not screwing your budget due to gambling, then, one way or another, you are already being responsible in terms of financial aspect. Now, you need to look at other angles, such as if you are still going to work on time, or your gambling doesn't affect any of your responsibility at home. So in my opinion, if gambling doesn't affect your usual day to day life as well as your financial aspect, then, I would say, you are more than likely a responsible gambler.