A good amount is not a small amount, of course we can stop for awhile and enjoy it, I've done that many times in my life.
Therefore I can say that I am not a professional in gambling
A good amount depends on how you accept that amount is.
For example, you've won a small amount but you think that's acceptable then that's a good amount for you. Not every gambler is not contented with every small wins that we have. There are still gamblers that are happy already as long as they've won small rather than losing big.
professionals does not do that, they gamble regularly and they will only stop when they needed to, either they will win or lose.
Yes, they gamble regularly but a professional gambler knows how to stop and it happens mostly if they keep on losing.