I like to have the rear left (in your photo) to be origin/X0Y0 and the front left to be XmaxY0. As Allted says, it does not matter but I am right handed and that orientation makes more sense to me when I am locking down the stock to the spoil board. Also the Y axis rail is not in the way. Also it make sense to rotate your table 90 degrees counterclockwise.
Reply To: Jagged Diagonals?