Thank you all for the responses. ColumbusGuy1 - the house was built in 1955 and I' m pretty sure the floor was original to the house. After posting my first message I pulled up a couple tiles that were damaged, and the floor is a solid 1'' thick red oak. I rented a commercial sander specially for parquet floors and it took me almost 3 hours to sand down one 10x12 room using the roughest grited paper they had...this stuff is like petrofied wood (which is a good thing, I guess). Picture below. I'm going to research other possible methods to sand down because at this rate, it will take me weeks to get the entire house sanded down (1500+ sq feet).

Oak floor throughout living, dining and family room. Currently a "yellowish". Walls are light gray and furniture transitional. I was thinking of something more "brown" would be more modern. Advise?

I would get a really beautiful piece of cloth with great colors and handmade design in whatever style you like and put a piece of glass over it.

I would get rid of all the dreary gray before deciding on the floors. Beyond that, the finish appears to be in reasonably good condition. Personally, I would be loathe to change the finish before it really needs it...which reduces the usable life of the floors. Maybe large area rug/s instead? Which leads to the question: Is this engineered flooring or solid 3/4" tongue and groove? If engineered, the wear layer thickness may limit you to either no chance of refinishing or either 1 or 2 refinishes at most. If anything goes wrong with the stain color on a refinish, you may have to either live with it or tear out and replace.