I'm a WASTER
Do you ever see the Bounty commercials and they use one papertowel for a spill. I use 1/2 a roll! I empty out the trash can at our house several times a week even though it is not full because I'm afraid my house will stink. When I cook things - if I don't use the whole package, I typically throw the rest away unless I know I can use the leftovers. For example, I will cook bacon for breakfast - I know we will only eat a few pieces but I'm compelled to cook the whole package.
Those are just a few examples, but I'm a clean freak and I think that is what makes me do what I do.