[quickthrowman]

Most of the mistakes homeowners make when doing electrical work are related to NM cable strapping (not enough straps typically), pigtails that are too short, junction boxes that arent properly secured, and inaccessible junction boxes.

He probably just checked to make sure you strapped the NM cable within 8-12” of the box (depending on if you have cable clamps or not) and then a strap every 54”. If you get the small details right they won’t be so harsh while inspecting.

If you are careful and follow the rules, it’s pretty straightforward to wire branch circuits in a house. Grounding and bonding a service entrance panelboard to ground rods/natural gas piping/water piping is not as straightforward as it seems.