I've lost track of how many books I've read over the years. I even had a fairly decent collection at one time (numbering over 3000 books), but I had to get rid of a large portion of those to make room for my kids. 
Anyway, here is a small snapshot of some of my favourites over the years...
Stephen Donaldson:
The Chronicles Of Thomas Covenant...
Lord Foul's Bane
The Illearth War
The Power That Preserves
The Wounded Land
The One Tree
White Gold Wielder
John Wyndham:
Day Of The Triffids
The Kraken Wakes
The Chrysalids
The Midwich Cuckoos
Herbert George Wells:
The War Of The Worlds
The Invisible Man
The Time Machine
The Island Of Dr. Moreau
The Food Of The Gods
Basil Copper:
The Great White Space
Into The Silence
Edgar Rice Burroughs:
Thuvia, Maid Of Mars
The Chessmen Of Mars
Tarzan Of The Apes
Alan Dean Foster:
Into The Out Of
Spellsinger
To The Vanishing Point
The Icerigger trilogy:
Icerigger
Mission To Moulokin
The Deluge Drivers
David Gemmell:
Waylander
Legend
Morningstar
Knights Of Dark Renown
Robert E. Howard:
The Conan stories
The Gods Of Bal-Sagoth (collection of short stories)
Solomon Kane
Katherine Kurtz:
Deryni Rising
Deryni Checkmate
High Deryni
The Bishop's Heir
The King's
The Quest For Saint Camber
Barbra Hambly:
The Darwath Trilogy:
1: The Time Of The Dark
2: The Walls Of Air
3: The Armies Of Daylight
Ian Fleming:
Dr. No
Goldfinger
You Only Live Twice
From Russia With Love
Live And Let Die
Thunderball
On Her Majesty's Secret Service
James Herbert:
The Rats
Lair
The Fog
The Dark
Raymond E. Feist:
Magician
Silverthorn
A Darkness At Sethanon
Dean R. Koontz:
Strangers
Cold Fire
Lightning
The Bad Place
Darkness Comes
Phantoms
Jules Verne:
Journey To The Centre Of The Earth
20,000 Leagues Under The Sea
Mysterious Island
Alexander Dumas:
The Three Musketeers
Ten Years Later
Twenty Years Later
The Man In The Iron Mask
The Count Of Monte Cristo
Douglas Adams:
The Hitch-Hiker's Guide To The Galaxy
Restaurant At The End Of The Universe
Clifford D. Simak:
All Flesh Is Grass
The Visitors
They Walked Like Men
Dennis Wheatley:
The Devil Rides Out
Uncharted Seas
Larry Niven:
The Mote In God's Eye
Dream Park
H. Beam Piper:
Little Fuzzy
Fuzzy Sapiens
Fuzzies and other people
Charles Dickens:
The Old Curiosity Shop
Oliver Twist
Great Expectations
A Christmas Carol
Robert Louis Stevenson:
Dr. Jekyll and Mr. Hyde
Treasure Island
Isaac Asimov:
I, Robot
The Bicentennial Man
J.R.R. Tolkien:
The Hobbit
The Lord Of The Rings (complete)
Clive Barker:
Books Of Blood series
Weaveworld
Robert Jordan:
Eye Of The World
The Great Hunt
The Dragon Reborn
The Complete Works of Edgar Allen Poe
The Cthulhu stories of H.P. Lovecraft
The Swiss Family Robinson by Johann Wyss
Involution Ocean by Bruce Sterling
Jurassic Park by Michael Crichton
The Body Snatchers by Jack Finney
The Warlock In Spite Of Himself by Christopher Stasheff
Massacre River (and other 'Fargo' novels) by John Benteen
The Ipcress File by Len Deighton
Frankenstein by Mary Shelley
Dracula by Bram Stoker
The Lost World by Sir Arthur Conan Doyle
I Am Legend by Richard Matheson
The Moon Pool by Abraham Merritt
Moby Dick by Herman Melville
Gulliver's Travels by Jonathan Swift
The Thirty-Nine Steps by John Buchan
Paradise Lost & Paradise Regained by John Milton
Duncton Wood by William Horwood
It's not an exhaustive list by any means, and there are many, many omissions, but I'd recommend any of these as a 'good read'. 
Comments
They're no longer part of my collection (game them to a friend), so they slipped my mind.I also liked some of Piers Anthony's Xanth novels - absolutely full of puns.
artur - I've only read a few of the Holmes stories, but you're right the guy had a lot of talent. I mentioned 'The Lost World' because it doesn't get enough attention, in my view. Glad to see someone else who appreciates it, along with his other less known works.
What about some of the Russian classics? Lots of great stuff there.
Oh, man, I haven't read a fictional book in a year soon. Think I'll have to pick something up this summer....
Artur - I've not read much Dahl to be honest. The only books I remember were a couple of his children's books that I read many moons ago.
I've read Tolstoy's War and Peace (quite some time ago), but not many other Russian authors. Are there any you would particularly recommend?
fatshodan - I've not come across Erikson's works, but then, I've not really bought many books in recent years. I had a hefty collection at one time and it just became very unwieldy (I literally gave away hundreds of titles to a local charity for them to make some money), so I weaned myself off buying books for quite a while.
I'll have to hit my local library and see if I can dig up that Malazan series. My wife would probably disown me if I bought any more books at the moment...
War and Peace is awesome at times and a little hard to read when the whole society stuff is described. Great book nonetheless.
Dostoyevskij has some great books. Crime and Punishment is a hard book to read, but very good.
artur79