Here in Philly- after receiving thousands of packages in my life, from every shipper I think this about covers it:

UPS is total crap. They are jerks, they don't knock, they lie and destroy almost everything they touch.

Fedex is the complete opposite, they are reliable and I've never had any issue with shipping or receiving from them.

USPS - just ship little things or you will be sorry.

I'm sure it different in various areas of the country, or even in different cities. But here in Philly please ship to me Fedex!