Or a personal mail box. I got one (at a local UPS store) originally because I was traveling so much and having so much trouble with USPS not doing vacation holds they promised, and because there was no one home to sign for packages that needed signing. But when I moved about a year ago I shifted all my mail that I could (everything except physically connected utilities that need to know my real home address, basically) to the UPS store address. Every single credit card I have uses that as its mailing address (though a small fraction of them know my physical address "behind the scenes"). All hotels and airlines only know my UPS store mailing address. I've even updated DMV successfully with it, so the registration in my car doesn't even show my home address any more! (Though California DMV doesn't automatically reissue DLs when you move, so instead my DL just shows my former residential address).

Because it's not a USPS mailbox, it's accepted at places that say "no PO boxes". (It's called a Suite number, not a PO box, in the actual address.)

Now, I don't know if I'd consider the cost worth it just for "hiding" my home address. But since I needed it for package signing while I'm away on travel, etc, it was a no brainer for me to move "all" my "sensitive" mail there instead of just packages.