I like both Fed-ex and UPS,
If I need a signature I like Fed-ex a bit more depending on who is delivering.
The few times I had a Fed-ex delivery I had needed a signature.
The last two times if I was not home, Fed-EX has left a note on my door.
The delivery person than came back and tried my house again later that same day and I was able to sign.
UPS, if I am not home and a signature is needed they will not try my house again that same day.

The 2 complaints I do have about UPS are...
1: You can not call your local UPS office directly.
2: The last 3 times I was home, the UPS man did not ring my door bell but
through the package on my front porch and left. I heard a loud bang and that is how I new the UPS man was here. A couple of times my contents arrived damaged. (no surprise the way the boxes looked.)