For at least 15 years I've been a perpendicular seating arranger; i.e. when eating in public at a table with another, I like to sit at a right angle to them and not opposite. It stems from having a low voice, as I can be heard better from the closer distance. I thought it was a me thing but I think it's getting quite popular cause I'm seeing it a lot more.
As an aside, for many years perpendicular was and sometimes still is, the only word that comes to me first in Irish before English. That's what I got from maths in school, or mata, if you will. And the word is ingéarach.