I have three female roommates (no knock to the ladies) who could care less about their car's appearance. I use their sleds as mules for various products because I know there is no chance of testing interference.
That's 30% of it. Mostly, I just can't stand seeing cars nicer than mine in such bad shape.
I also maintain my parents' fleet but when you factor in my undergrad tuition, I'm paid pretty well for those jobs
