There is no ideal fansite, IMO. But what I like to see in a site is creativity; something I don't see anywhere else. A lot of sites on the web have the same exact images, fanfics, and fan art. Bor-ing. A site that has something new and creative, not that's interesting. To keep my attention, show me something that I haven't already seen, like original art or fic that hasn't also appeared everywhere else on the net, or something that nobody else has thought of.