For my part, a BBS shave is when you feel across your face in ALL directions and its jut plain smooth!! It will depend on not just your experiience, but which razor you might be useing that day, each razor in a rotation will be a bit different. Your face prep. of course. And the amount of time you have that day, not to mention the OCD factor. I go WTG/XTG/ATG and then very cold water rinse with lots of cold water, I feel it tightens the skin and allows the stuble to present for better cutting. All the touch ups at that point are easier when you can feel the beard better. Razor burn?? Yes that will sometimes go with the teritory, but not always.
Thanks for letting me chime in,

tinkersd of SRP!