I'd estimate that 75% of my rentals are 1 day. The remainder are 2 day rentals. Add in the fact that I have no affinity for car brands equates to me not caring much about what I'm given. As long as there's no smoke odor, I'm good.

I'd probably be worry about it a little more if I were keeping the car longer. Although, I probably still will never look at the tire brands unless I were driving in the snow.