I've been a real estate agent a long time. A looong time. And during that time I've attended a lot of inspections, and I learn something new at each and every inspection.
The knowledge I've picked up from random inspectors has proved invaluable as I show properties to my clients. It helps me know what I'm looking "for", and what I'm looking "at".
One of the tidbits I've picked up over the years, I have repeated to buyers and sellers is that a smoke detector is required, by local law, to be present within 15 feet of each bedroom. And often that means one detector located on the hall ceiling outside of the bedrooms.
I know it's not our job to keep up on all the rules and laws, but it's a good thing to stay current on some of them. In my recent inspection, the inspector tells me that the rules now say that you have to have a smoke detector inside each bedroom.
I know that I've seen a few houses with one inside each bedroom, and I thought that was very safe, but a little overkill... I guess not, since that's the rule, today.
Good to know.