We all know that we cannot play for a long time without being responsible players; we could go crazy, or we could lose all our money; at some point, you have to realize that you need to play responsibly, so I created this poll and this discussion to pick your reasons and explain it.
In my case, I have to lose a lot of money to realize I have to gamble responsibly if I don't want to break my finances and experience depression, so now I control myself and monitor my expenses, and I'm doing good with it.
Regret always comes at the end, not at the beginning. So, the most common answer must be "when I lost a lot of money".
Most of gamblers are stubborn and have a high ego. Only personal experience can make someone become a responsible gambler.
My golden principle when gambling now is, "gamble with the money you can afford to lose, do not gamble with your life"