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.

I actually just finished Three Body Problem yesterday. Really fascinating perspective and lots of big ideas, even if the characters could be better and there could be less telling and more showing. But can't wait to get my hands on the rest of the trilogy!