As anyone observed who had a TV with just basic analog terrestrial antennas, before cable and satellite dishes - it does make a difference to the signal, when and where you stand and countless pieces of physical comedy in TV shows incorporated that.

As soon as I've read your comment, I've thought about this Mr. Bean's sketch: https://www.youtube.com/watch?v=4S9-vDow2d0

And reflections on other buildings (which usually cannot be compensated for,) wind bending antennas, etc.