I quite like AO3. My fic is getting a lot more drive-bys, I think, there than it had been on my own site -- at least in part because to find my site, you really needed to be looking for Utena fic, and the other-fandom stuff was getting neglected. I should upload the HP fic Akycha and I wrote together sometime -- I bet it would find more love on AO3 than it did in the actual HP community. (I learned that not many people like Ginnyfics, particularly ones that pretty much tease Ginny/Harry and end up being not only [horror!] femslash, but Ginny/Hermione.)