I live completely debt free. That's one reason my house isn't completed yet, but I wouldn't have it any other way. I like looking forward to being able to finish or improve something. I work towards it and when I accomplish it, there is no better feeling or reward.
I think if I won a ton of money and had everything I could ever dream of, I'd have to help others accomplish their dreams. If one is not working towards something, there can never be that feeling of accomplishment and satisfaction.