My second favorite is Hungry because it's the only Shaggy Dog story on the site.

As of now I like this one called Of Gods and Men and its very interesting because not many people have written Azula and Aang as a mature couple. Basically after the war, Aang claims her as a war trophy in a sense. But they had this odd sensual relationship before hand where she was on the run and then let him captured her. I can't really say too much else without spoilers.

I also liked this one called In The Madhouse which was about Azula being but in an institution with a sadistic doctor. It's been a while since I've read that one though.