This is what the physical room of my Chamber would look like. Plenty of light, gorgeous architecture sans the people. I'd have comfortable armchairs set up with huge shelves lining the walls with all the books and art I could ever need in case there came a time I had to hide in Chamber for whatever reason.

And the only reason I could think of is if people started hunting after the Heir of Slytherin with pitchforks. So it'd have to be quite comfortable for a long stay!