I am sure it is personality based. I have a huge stash of fabric and can make an entire quilt without going shopping...most of the time. I live by myself with 2 large dogs. I buy huge bags of dog food and never run out, I can eat for weeks without going to the store for anything but milk and bread. I grew up in a frugal family and was frugal when raising 4 kids. My kids didn't know you could buy a cookie in the grocery store, and I used 10# of flour a week baking bread. And I made all my daughter's clothes and many of the boys clothes. Of course my daughter now is very wasteful and it drives me nuts, she cleans the house before the cleaning lady comes.