Gosh. Plenty in this thread that I wouldn't use as firelighters, let alone ever want to read again. The Lord of the Rings I've read 7 times, and I loathe it more with each reading. Eddings - tripe. Feist - fluffy, but insubstantial.
The measure of a book with me is whether I own it in hardcover. I *don't* buy hardcover books - too expensive, too bulky; easier to wait 6 months and buy the mass market paperback for a third of the cost. But a very select few books are ones that I've bought as paperbacks, read, re-read, and then bought in hardcover because the stories were that good.
My hardback shelf consists of A Song of Ice and Fire by George RR Martin - fantastically gritty fantasy set in a period like the Wars of the Roses; shame he'll die and leave it unfinished);
Robert Jordan's Wheel of Time - although he DID die ad leave it unfinished, he left enough notes that another author could come in and finish it off; it's a HUGE undertaking, yet I've read it from start to (current) finish several times now and it only gets better.
Peter F Hamilton's Commonwealth Saga books, both series - OK, this is science fiction in the grand, galaxy-spanning space opera vein, but it's really, really good. the conclusion to the first two-volume tale consisted of about 500 pages of non-stop, leaves you breathless action.
And that's the lot. I really enjoy David Gemmel's books - especially the Drenai tales. I re-read Legend last month (third or fourth time), but they are a bit like Saturday afternoon westerns - the good guys are good, the bad guys wear black hats to help you out, and he's reused certain plots and battles more than once (at last count he had FOUR renditions of what is effectively the Battle of Thermopylae - overwhelming force faced down by a numerically inferior band of heroes holding a narrow pass - including a fictionalised account of the actual battle itself in one series). So he gets no points for originality. But as light entertainment, it's hard to beat. And he had the good grace to die after effectively finishing one of his trilogies (although it wasn't actually very good). I don't own any of them in hardcover, though, which ought totell you that I think that they are good, worth reading, but not classics that must be preserved for all time.
I want to get Peter Brett's Warded Man series in hardcover next. The second book made me *cry* last night. I'm over 40; fantasy novels shouldn't be written so well that they reduce me to tears. Of course, the series could still go horribly off the boil, but so far he's packed an awful lot into two books that aren't very large.