I started the Hainish Cycle books by Ursula Le Guin and have gotten to The Left Hand of Darkness . They are a lot of fun as they feel very nostalgic for me. I very much want to re-read some Anne McCaffrey after this. They are also very sad, as they are usually allegorical and do not reflect our society in a positive light. Nevertheless, they ring very true and are very thought provoking, and her writing is outstanding.
Edit: If anyone is a fan of Le Guin but has NOT read any of Octavia Butler, I highly recommend her works. Especially the Xenogenesis trilogy.