I've become partial to the triangle corners, as explained above.
Others have said that you're giving it, and let the recipient figure out what to do with it. True ........................buttttttttt .... if you give it to them "ready to go", I bet it will get hung up a lot quicker! Otherwise, they may set it aside as they aren't sure what to do with it and how to do it. Or may think it's meant to be a table topper ... and you may be disappointed, with no fault to them.
In all honestly, I'd finish it up, ready to hang, complete with the hanger ..... and even a hook/nail for the wall!!