Losing trader:

He trades too much, because being out of the market is like doing nothing for him.

He wants to predict correctly, because he takes it personally.

After a loss, he quickly enters the next trade because he feels he needs to make up for the previous loss.

Profit Trader:

He can sit for hours and do nothing.

He can accept the loss without proving that his analysis was correct.

Even when the market doesn't go according to his expectations, he sticks to his plan.

He measures the trading day by the quality of his trade execution, not by profit and loss.