What do you prefer calling the people who work on planes?

Flight attendant

Engineers, mechanics. . ☺

Pilots? Co-Pilots? Flight attendants?

I think I default to FA without thinking about it, but I probably say both

The term "Stewardess" was phased out in the aviation industry in the late 1970s to promote gender neutrality in that career choice, which then became "Flight Attendant" and which included both males and females... and everyone in-between who can't figure out which bathroom to use.