I don't include other time in the logbook I keep for commercial employment purposes. I think the only reason why the Air Force counts other time is so the hours count towards your flight pay. Can you imagine grabbing the jump seat home on an airliner and logging that time? Can you learn something sitting in the jump seat? Definitely, but I really wouldn't count that time towards anything. I even know guys trying to log PIC time as right seaters, but that's a whole other story.