About a year ago I found this site that lists the top 100 fantasy books and I thought I'd share it here. Anyone can vote for their top 10 books and then the site prepares the top 100. I'm not quite sure how often it's updated, but it also contains a "Next 100 Fantasy Books" so I guess once you're done with the first there's plenty more.
When I first found this site, I was relatively new to the genre and decided to use it as a basis for my reading and it actually worked out pretty well until I found other places for my book addiction. Plus, I'm really obsessed with lists.
Below are the top 10:
1. The Lord of the Rings - J.R.R. Tolkien
2. Harry Potter Series - J. K. Rowling
3. The Hobbit - J.R.R. Tolkien
4. Wheel of Time Series - Robert Jordan
5. A Song of Ice and Fire - George R.R. Martin
6. The Lion the Witch and the Wardrobe - C.S. Lewis
7. The Belgariad Series - David Eddings
8. Wizard's First Rule - Terry Goodkind
9. Magician - Raymond E. Feist
10. His Dark Materials Trilogy - Philip Pullman
**I've read at least one book of 8 of the top 10 (all except Wizard's First Rule and His Dark Materials)
**I've read 32 of the top 100
The site also has links to the top 100 fantasy films, the top 100 sci fi books (and films), and you can click on any book or film to find a synopsis and a category where the book belongs (such as Misfits and Mavericks or Kid's stuff).