Guess it boils down to the individual delivery drivers servicing your area.  My experiences with UPS have been consistently positive.  With FedEx, by contrast, I seem to get unexplained delays, strange routing/backtracking and have witnessed occasional indelicate handling.  Our local USPS is at the absolute bottom of the heap.  Lost packages, multiple notes left on our mailbox stating they couldn't complete deliveries when we were actually at home at the time (the PO admitted that some carriers do this as a way of avoiding coming up the driveway when they are running behind) and the above-mentioned package tossed into my bushes.  Between that and the prolific junk mail, I am starting to lean towards the close down USPS camp.