My friend from high school made a website for us to use as a forum (homework, random topics and the lot). Reason I bring it up is because I think he did a phenomenal job on the styling. I think its an example of a dark website done well.
I don't care as well as they're done well, and to neither extreme.
Dark websites that truly get in blacks are too annoying and strain my eyes, but medium-dark grays work well. Just as brighter websites that use almost gray whites are nice, but also use some brighter colors do well also.