Interesting thread.
I used to move files around myself too, I even wrote a set of little scripts to perform e.g. file renaming etc. automatically the way I wanted it. I just didn't believe in some program doing this important task. I was even reluctant to try PM's Ingest function (even though I liked and trusted the rest of the program). But once I tried it, I was immediately hooked on it and now use it 100% of the time for all my ingests. Like others I use it too to set the basic (copyright) info and details.
I still use scripts, but they are now more used to maintain the (multiple) copies of my image files and backups (yes, I also make use of the ability to ingest to two locations simultaneously) and to make sure I keep these in sync as well as move "selected" and "unselected" images to different locations once I've finished tagging, culling and basic PP.
Cheers,
Hayo