Instead of closing entire post offices, which are required for communication between citizens and government, why not just reduce delivery days, and operate on a skeleton crew for non-delivery days? In other worRAB, instead of picking 3000 post offices and closing them completely, pick four times as many, and just reduce delivery days and counter hours. I'd be perfectly happy if my local post office was open and I got mail on Monday, Wednesday, Friday, and every other Saturday. Fuel savings alone would be worth that kind of change.
I still prefer to ship by USPS. UPS is a fucking union shop, and they play kick the can with your shipment (unless they think it's valuable, and steal it). FedEx is higher quality, but at a price premium.