Forget Hannibal, Red Dragon is the BEST book in that set!!!
Memory, Sorrow and Thorn trilogy <- ROCKED
Death Gate Cycle. I have the first few, read up to that one with the lava and dragon on it whatever that was, and lost interest. May get around to it one day.
Snow Crash - On my bookshelf in the queue
Got as much as I could after reading Cryptonomicon (did I mention that is one of my favorite books ever?)
Covenant Series -- Long time ago. I remember it being very vivid and thought provoking...Dark perhaps. Need to read that series again for certain.
Will have to take a look at the others. Xanth, heard of it, never had the urge though, perhaps I should...