Dutch fashion photographer Frank Doorhof interviews a number of photographers, including Scott Hargis this past November at GPP in Dubai.
The part where Frank is talking to Scott about interior photography is from 14:00 through 24:00. The rest of the video is interesting too but real estate photographers will find the discussion with Scott particularly interesting.
Scott talks about composition, verticals, controlling reflections with toilet paper and being in control of the light. Well worth 10 minutes of your time.

Started out doing photography at the age of 6 using an uncle's old 1940 kodak brownie box camera. At 15 years of age, I decided to buy my very own 1975 Praktica SLR camera. I now shoot with a Nikon D850. I do unpaid TFP and commercial paid work.