Some of the best fantasy writing I have ever read (and it's great for an older crowd too) is Guy Gavriel Kay's books, I like specifically his stand alone novel Tigana, and his trilogy called the Fionavar Tapestry, odd names, excellent books.
David Gemmell's book Legend is an absolute classic you won't regret reading.
Jim Butchers books are some of my favorite, he knows how to write and make you read till morning comes again, look for his Dresden Files and Codex Alera books (Dresden if you like modern age fantasy, the Codex if you like things Roman!).
If you want to read about Paladins, and like a female hero for a nice change then read Elizabeth Moon's: The Deed of Paksenarrion saga, a classic.
If you want brainless, but, entertaining and action packed fantasy and love D&D read R.A. Salvatore's books, any will do, the D&D ones start with the Icewind Dale trilogy and go from there. If you like funny dwarfs and priestly doings read The Cleric Quintet. I also enjoyed his Demon Wars saga though that's not D&D.
What's that? Still you need more?! Okay, for a different experience read Elantris by Brandon Sanderson. Or you can always read the Earthsea Trilogy by Ursula K. Le Guin, they are short to the point and good reads. There are more (David Eddings for instance), but, I think this list will do for now. Good luck. ;p