I really enjoyed The Hyperion Cantos, and the first few Dune books I read a long time ago (may reread these now). Can anyone recommend some other books (or series) along these lines? Huge stories on an epic scale, space battles, cool future tech, etc.
The Imperial Radch trilogy by Ann Leckie was very good. It's got a few interesting themes along with the space battles and evil empires and weird aliens, like gender and personhood. I hear there's a new book in the same universe, but unconnected to the trilogy characters, that just came out I think?
I think The Expanse is a pretty obvious recommendation.
I also really like the Remembrance of Earth's Past books by Cixin Liu, but I'm not sure I'd call that a Space Opera. It's a series, yes, but it is very unlike other long-form space operas.
The expanse is probably the best sci fi series of recent past. It is only comparable to classics like Asimov and le Guin in quality, although it has a very different philosophy and style.
The show is my favorite show of all time and I still think the books are better. If you liked the show, at all, you'll really like the books. Amos Burton is probably my favorite character in any fictional universe.
I would recommend the Red Rising series by Pierce Brown. Every book takes place on a different planet with an amazing amount of character building and detail in the plot.