I must be way too anal, I would bet if you asked any one of my regular dive buddies they would say I check everybody's air at least every five to seven minutes. It is just something that stuck with us from day 1. nobody had an octo, guages failed, and computers didn't exist. We just planned (plan) and dove the Navy Dive tables and double check(ed) everything....... My guess is TSandM (Lynne) and I would get along fine.....
Don't think that is anal at all. On gas limited dives, the fastest user controls the dive, nice to know who that is and when that is before it actually happens.
Go back another decade, and those fancy new gauge things were not in use. Take 50 divers out on a dive trip, and you could expect at least one to have accidentally pulled their j valve down and would run out of air on every dive. Now that we have gauges, it is kind of nice to actually use them.
I've never been on a dive where I did not check my buddy's air (or J-valve position). It is part of being a buddy...but I check more often with an insta-buddy.