I'm rather fond of the story displays at fanfiction.net - because those can be directly imported from a word processor and therefore allow all formatting like bold/italics to be conserved.
And I stopped putting any of my fic on fanfiction.net over a year ago because their HTMLing system deletes the row of asterisks I use as section breaks - so my fic turned into one long chunk with POV switching all over the place. :p They also now insist on upload by chapter, so I can't upload a long fic in one go and I also need to have each chapter saved separately on my hard drive, which I never do. :p
I love the HTML display that Annette has on Annesplace, and she uses a similar one for me on the Doctor Who fanfic site she made me. These days, all the fic I read online is in HTML format, which makes it even harder to go back to look at anything on the L&C archive, because of the font, the proportional spacing, the short lines and the lack of real formatting. I think we must be one of the very few online archives that still sticks to plain text.
But then I've voted for HTML every time the question's been asked.
Wendy