best floor in listening room

Its all about overall synergy.

Any floor is fine long as you put things in place accordingly. Wood floors will tend to interact with sound and be more lively than most others. So proceed accordingly. Less speaker, like a smaller monitor, may be more in such a case. Its like making soup...you just have to mix the right ingredients. My preference is towards a more inert floor to start with if possible. Thin padded carpet over solid concrete foundation is best.

Be gentleman and please your lady.
Put some rug in the middle to dampen the wood floor and leave happy.

Ah, I think I get it. It's easier to change the system than the wife. Many good monitors out there. Thanks, folks.

I have hardwoods with thick wool carpet in the center. Your room will get more live. Add more treatment to tone it down to your liking. Let the wife help you pick out the colors and designs. She'll love it.