You're right though there are some person who feel excited while gambling, regardless to there loses yet they still feel excited,reason been that they know gambling itself is just part of fun. they are just playing for fun,and also for intertainment, they don't expect wining except when luck is on there side that is when they can win.but there are some person who bet more often hoping for luck to always be on there side everytime they gamble, and this set of people doesn't feel excited when gambling,because they intend to be wining whenever they gamble.
If you lose too often, you will feel bored, of course you will feel sad and not enthusiastic about losing money. Often the initial goal of having fun is lost along with losses experienced, not everyone can control their emotions well. It's true, there are also many people who always hope to win, usually they take risks with money that they planned to use for other needs, but instead they use it for gambling. That's why they always hope for luck and can't accept defeat.