Poll: Which End of the Garage is the "Back" and Why?

Regardless of poll results we'll never truly get a consensus on this. It's just too confusing, at least it appears to be with my setup.
The front of my house faces the street, which is south. The overhead-door side of my garage faces the alley; that's north. Most approach my garage from the front of the house, but by the "drive in" definition, my house and garage would be back to back. I either say "walk-through door side" or "overhead door side", or for friends very famliar with my house, "north wall' or "south wall" because even they wonder exactly what I mean when I say "back wall"--which to me, inherently means the one furthest from the overhead door.