No, no, no, no, no, no, no!!!
I HATE dark backgrounds with white text. It's hard to read. I'll often leave light-on-dark Web sites because I can't stand to look at them.
There seems to some sort of love affair between some Linux users and black/dark backagrounds. I'm constantly seeing these things posted as screen shots of someone's desktop and on Linux backgrounds sites. Fortunately, we have lots of choices. I do like the VL 6 Deluxe background (the lighter version), but I'd never call it a dark background.
I know quite a few people who don't like dark backgrounds on Web pages. Others do like them, but I don't think we should have a Web site that some find a turnoff.