Square is my favorite but never used in industrial maintenance much. The square combos are on new electrical devices for construction though. I use mostly Phillips/slotted. A few security torx. Lots of hex heads, and all the small electrical terminals are slotted.
My wife and I were just talking about this the other day.
I’m not in IT but I work as an industrial maintenance electrician, and knowing how computers work solves more problems than people realize!