Just finished the Remembrance of Earth's Past trilogy by Cixin Liu a couple days ago...it's reminded me of how mind-blowing and mind-expanding sci-fi can be. It's an incredibly bleak and yet somehow still hopeful series and aside from issues with how Liu handles characters, I can't wait to re-read it after I've had some time to digest the ideas in it. Definitely recommend if you like big ideas in sci-fi and can deal with some iffy character writing.