This kind of dilemma makes our heads difficult to choose.
You either want to be positive because it's beneficial or you'll hate it but will choose the negative sides because you're always losing. We can't define each situation when you ask this kind of tricky question.
This is not an option because there is no way we will choose something negative. Indeed, we cannot determine the situation every time we gamble but if you only gamble when in a good mood and also only gamble with money that can be eliminated, then at least you will gamble with the positive side even though the results are not always good, but with these efforts at least it will makes you have control and will be aware of the time to stop when negative results are obtained.
As far as I know from gambling, no one can provide a positive side, where gambling is a bad place that puts many people at risk, so you better be able to be careful when you want to gamble, at least you should be able to prepare yourself between losses with large amount or fortunately no one can provide a guarantee.
just don't play with more money than you can afford to lose and all will be fine.