Vote for the Top 100 Science Fiction and Fantasy books/series on NPR!

They had a call for suggestions, which I sadly missed, as they didn't include Terry Pratchett's Discworld series. Oh, well.

Not a bad list, but by no means definitive.

http://www.npr.org/2011/08/02/138894873/vote-for-top-100-science-fiction-fantasy-titles