Producing high quality photos (especially with interior photography) is challenging, and there are many different approaches with various levels of equipment and effort that can be applied. Pointing a high-end camera and a couple of flashes at a living space does not automatically produce a great photo. When preparing to take a photo, some of the considerations are:
What color temperature is the ambient light?
How bright is the ambient light inside and outside?
Are there multiple light sources with differing color temperatures?
What direction is the light going?
Is the light balanced?
Are there distracting glares?
How important is the view out the window?
What objects or areas should be highlighted in this scene?
I consider all of these aspects important for every photo I take. I use a combination of multiple wireless flashes, light stands, light modifiers, and advanced Photoshop techniques to make the lighting more appealing and beautiful than what would normally be captured in a standard photo.
Below you can see examples of photos before any work is done (standard photos taken with a high-end camera), compared to photos after I photograph, edit, and finalize the images. All the photos I produce are like the "after" versions.