He's not a good story teller though, the books so far as I recall them were dull and an absolute chore to read. They could have been cut to about half the length by removing all the ridiculous waffle about Covenant and would have been a far better read for it.
I think the Covenant books are among the best books I have read, and are definitely one of my most highly recommended series. Donaldson is not an easy read, but to me his story, characterisation and descriptive skills are unmatched. The books are not as dense and unwieldy as the Wheel of Time (from Book 5 or so onwards), but I can understand that many would be turned off because it is not conventional fantasy at all.
If you want an original fantasy for adults, Thomas Covenant is highly recommeded by me.
Others that have been mentioned:
- Song of Ice and Fire by George RR Martin: Superb amazing stuff - but the 4th book falls flat on its face, and we are waiting for GRRM to redeem the story at the moment...
- Memory, Sorrow and Thorn by Tad Williams: An excellent story but bloated in places (think the Treebeard chapter in LOTR).
If you want action and bloodshed, I recommend:
- Orcs by Stan Nichols: Hilarious and off-beat take on fantasy, very dark and very enjoyable
- Legend by David Gemmel: Epic - also would recommend the first 2 Rigante books
Humour: Terry Pratchett. Thats all.