Making a fresh deposit each time is a pretty clever move. It creates a kind of mental reset, separating your winnings from your gambling money, and helps you keep tabs on your spending.
Of course, hitting it big is a rush, but it's not always about the money. Sometimes the best memories are made just by playing the game.
It depends. If, after winning, the gambler decides to withdraw his profit and take a break for some hours or a day before depositing a fresh amount to start again, that will create a fresh mindset and mental rest like you said, but doing otherwise will be contrary to what you said.
And that is why I usually argue when people tell me that everybody is actually gambling for profit-making purposes. To some gamblers, winning is not just a top priority, but the fun that they derive from it is of uttermost importance to them. All the time in the past that I went out to gamble with my friends, to be honest, losing was not really a big deal for us because, if it were, we would have been reckless or addicted because we would just be striving for winning, but that was not the case. I enjoy the fun more than anything else.