Yesterday, the inspector came and issued 7 corrections. 6 of them are pretty isolated and local. The last has to do with grounding all metal boxes. I thought when one screws the switch onto the metal box it should already be grounded. Evidently, it was not enough for the inspector. He would like to have an addition wire (grounding pigtail wire) screwed directly to the box. Since the gauge I use is either 14 or 12. Maybe, there is no enough room for all boxes. For those boxes, I decide to use plastic ones and it can save an addition wire to make room for others.
By next Wednesday, I should request for a follow-up inspection. After the dry wall is done, the inspector will come to have the final one.