Why is that? I think people like to feel engaged, they like to learn new things. Reading ten books about investing and spending a thousand hours on an internet forum to learn the finer points of asset allocation is much more fun than buying a more fuel efficient car, even if they have equivalent financial paybacks.
That's a point. It's exciting to see the numbers in your bank account get bigger, and it's fun to always be looking out for that next 1031 Exchange, or the newest way to hide taxes in depreciation, et cetera, et cetera. For most people, it's not so much fun to avoid driving your clown car or to hypermile when you do.
It is fun for me, though, and it's not really getting old. In a way, I get the same thrill of the hunt when I see my average MPGs go up that I do when I see the month's rent checks come in. They mean the same thing to me, efficiency, productivity, and taking control of my life.