This question is not just related to wifi of course.

My understanding is if the dipoles are opposite of each other
(example 1: -----O----- ) then the lobe is an equal donut
shape from the center. I would get equal focus upstairs
downstairs ends of the house if wifi base is placed in the center.
(a big vertical donut sitting in center of the house with edges
of donut touching roof, 1st floor, end to end in the house [ O ] -- house )
(nulled in the front and back of the house.

What does the lobe look like if the dipoles are vertically
opposite from each other? (Example 2: |_o_| )
Is the majority of the lobe pointing to the sky and less to
the ground? Wouldnt that take away strength from the ends
of the house? Or am I totally off base? This question comes
from a recommendation that the antennas should be vertical as
in example 2. Maybe that is the idea is to lower interference
to neighbors. Thanks for all your input... Dean