I see that you've mostly read fantasy. Let me throw The Darwath Trilogy by Barbara Hambly in there - The Time of the Dark, The Walls of Air, and Armies of Daylight. Great, gripping fantasy/horror stories with probably the simplest and best magic "system" I've ever seen depicted. I still want to see a prequel series about the life of one of the main characters before the events in the Trilogy.
Also, a Sci-Fi recommendation - the Vorkosigan series by Lois McMaster Bujold. The early ones are very, very good and even the later ones, although the novelty has worn off, are pretty good.
If you want a never-ending list of recommendations, join LibraryThing. It shows you the reading lists of other people who have read the same books as you. Brilliant idea.
Good luck on your recovery!