There are over 200 science fiction book lists goodreads.com. Here are links to a few you may like in particular. The lists run for 12 pages.
163 books on the Golden Age New Wave Science Fiction list
http://www.goodreads.com/list/show/2351.…
142 books on the Science Fiction Masterworks list
http://www.goodreads.com/list/show/6228.…
33 books on the Best Classical Science Fiction Works list
http://www.goodreads.com/list/show/3923.…
Goodreads.com is a free website with thousands of books lists. You see the cover of the book and get a link to the book description. The lists are created by contributors who rate and review the books so you get a lot of input sometimes by hundreds of people.
At this site, for instance, you can pick science fiction and then get more specific lists like books that deal with time travel or aliens or robots. The main address is
http://www.goodreads.com/
paste the link I gave you above into your browser
click the explore tab (you don't have to log in to use the site)
scroll down a bit to the genre tags and select what appeals to you
This site includes lists for children, young adults, adults, sci fi fiends, romance junkies, etc.
When you have time, just noodle around the website. There are three different types of search boxes and they don't all show up on a page depending where you are. Book mark lists you like so you can find them later.
