Our UPS driver has been working this route for over 20yrs., and is getting ready to retire in another month or so. He's a hunter/shooter, and belongs to our local gun club. He knows where my folks & sisters live & work, so if I give him advance notice when I'm going to be out of town for a few days, I don't have to worry about packages sitting outdoors while I'm away. OTOH, a year or so ago, while he was on vacation, a substitute driver left a package containing new BAT 3L action on my front steps (facing the county road), which I didn't find for a couple of days, as I park in my attached garage/shop, and seldom come in or go out of the front door.
The FedEx driver is also a friend-of-a-friend, a shooter, and always gives me a call on my cell phone when he's got a package for me. Couldn't ask for better service on this end from either company.
The local USPS postmistress is a good gal, and actively solicited my business when I started shipping stuff in connection with a part-time gunsmithing business.
The only memorable issue I've had with any of these folks was when FedEx tried to deliver a CMP Rem40X last year - I was roading our tractor down to the house in anticipation of receiving & signing for the package, when, from about 1/2mi. away, I saw the FedEx van drive into my yard. Not having the driver's cell # (this was from a different terminal than the above-mentioned driver), I couldn't do anything more than try to attract his attention by flashing the tractor's lights. That didn't work, so rather than have the 40X sit in their terminal over the weekend, I cleaned up a bit, jumped in the Hemi Magnum, picked up a ladyfriend, and drove the 60mi. to their terminal before closing time. I got there in time to sign for the rifle, had a good dinner with the ladyfriend, and got home in time to unpack & inspect the rifle. It's all about priorities....