This house had a poor quality fiber board for the floors so I replaced them with new birch. I decided to play with some different patterns and scored them, and then gave them some stain and gloss poly.
I also decided that the 3rd floor attic was not very functional, so I lowered the divider walls a bit (the ceilings were over 10" high!), which will give a bit more headroom in the attic - enough for 2 additional, functional, rooms! Yay!