When I was on WinXP I did had the roil noir theme.
Now on Win 7 I've just set my aero to as black as possible.
I also don't think that the black setting is depressing.
(not if you do it right.
)
I think I HAVE checked that Nasa them once.
Also used a Persona Called "Area 51 black" for a while.
But now I have no need for theme's/persona's, since I've figured out how to paint the toolbars with style code.