I decided to re-read The Left Hand of Darkness, because I had forgotten most of it. I only remembered that I liked it very much when I read it a few years ago (it's been a long time since I first read it). Unfortunately I didn't like it very much this time.
I think that The Left Hand of Darkness is worth reading, because it's a classic science fiction book, but unfortunately it's a mediocre and a bit boring science fiction book. (It's interesting how one's opinions can change over the years, so it's good to read certain books again.)
I understand why some people think The Left Hand of Darkness is a great book, but there are much better and more complex science fiction books out there, so you don't necessarily have to read this book. Reading this book isn't a waste of time, but you can easily find something more interesting to read.