I've used both methods and actually prefer the "radial" that you mention, granted there is adequate access and work space in an accessible attic space where the junction is located. I even put a box above each room or area and then "spider" out from there when appropriate.
You'd be surprised how much easier finish is when you have only one cable coming into each outlet box. I personally find that the time savings in finish make-up out weighs the time it takes to screw in a box and install a few romex connectors.
