There really aren't any rules to this - do it how you want to do it, and don't get hung up with trying to follow a specific procedure. Did the room really blow you away? Then show us pics that capture that feeling. Was the restaurant sub par? Show (and tell) us why.
You're right about photographing other guests and hotel staff though - it's polite to keep recognizable faces out of your pics. I have, however, asked certain hotel staff if I could take their picture to include in my trip report (because of stellar service), and I haven't been refused yet.
Have fun writing it up!