Oh hey! We have gray floors.
Just to review, we started with these lovely floors you see above. They weren't pretty, but they were in good shape. I removed the carpet, carpet padding, tack strips and loose nails, sanded, and then primed.
After priming I filled holes with wood filler and caulked up any big gaps, then primed again. After that, the floors were flawless and ready for paint.
And I went with gray. So glad I did.
Here are some lovely, grainy nighttime shots of the floor.
I took these photos the night I finished, then the next day Rand immediately moved his desk and mess back into the room. I doubt I'll be sharing any photos that craziness.
This has made me realize that all my upstairs floors should be gray.