I found a number of top ten science fiction novel lists. I have to confess that I haven't read very many of them, but I have the best hit ratio on Rob Grant's list. Michael Moorcock's list has a lot of material I own but is still in the in-box.
Check out the top ten list as compiled by:
How many have you read?
I tried to compile my own top ten list, but I have a problem where several books from the same author all seem like they belong. My top ten list ended up being about thirty books long. That, and I haven't read all the so-called "must-read" books. The world will just have to go on without my list.