Not a good idea for me.
"Dark versions of interfaces are reckoned by some to be easier on the eyes..."
Not if you are my age. I struggle with dark themes and avoid them where I can. Physiologically your eyes let less light in the older you are. The cornea of a person of 60 will only pass a certain percentage of light to the retina compared to that of a person of 20.
Lack of contrast on some sites, I'm looking at you EVE Online, makes my life a misery. Black on white is definitely easier to read than white on black, or in Eve's case grey on black. Bah!