Oh, everything. Tolkien, CS Lewis, Lloyd Alexandar, "Shannara", Piers Anthony, "Wheel of Time", the "Harold Shea" stories, the "Enchanted Forest Chronicles", four or five different Arthur interpretations...
I've read "Thomas Covenant". Hated it beyond all reason.
Ok, hit my word count, at a good stopping point, it's bedtime.
Hmmm--pretty good sign if you had already read that and still liked Potter.
The first time I started the first Thomas Covenant book I got turned off about 50 pages in. But my best friend who was a Tolkien and Lewis fan assured me the rest of the series was worthwhile, so I forced myself to finish the first book, and it definitely got better IMO. I liked the Ravers and the Dune-like stuff, and there's a couple scenes which I really like.
Have a good night!