There IS some good stuff at fanfiction.net, but it tends to be the earlier pieces. Instead of starting on page 1, start on the last page (I think the're up to page 184 now) and work forward. Don't skip the poetry - some of it is excellent! You might also want to check out
Versaphile, which provides links to many fanfiction sites and lots of stories. Unfortunately, a high percentage of the stories linked there are slash, but at least the're WELL-WRITTEN slash. And there are some non-slash pieces linked there as well.
Anyone care to speculate as to why slash tends to dominate fanfiction (of all genres)?
It never matters what the genre is, good fanfiction is ALWAYS hard to find! If anyone finds a link to that epic Daeron poem, I'd appreciate seeing it posted.