Okay, I read "Forever War" and then "Forever Free" by Joe Haldeman....

"Forever War" was a fine book, though it felt a little anti-climactic. Not a bad read.

"Forever Free" was frustrating. Learning about what this universe had evolved into was cool, but at a certain point the plot veers off into mystery territory, and the resolution/ending is very sudden and deeply unsatisfying. Some people will like this book, but I was disappointed in the end.

Now to pick something new...

@cammerman Appreciate your comment. I never read Forever Free, but I read Forever Peace, which I found interesting but quite different.
It's been years, but some ideas from that book still rattle in my head: the separation of the world between nations of haves and have-nots, militarization of that separation. The protagonist's "have"-nation was a post-scarcity, universal basic-income type place, and yet, somehow still dystopian, even apart from its role in the global disaffection
@cammerman People who worked jobs earned credits to spend on better housing, luxuries like alcohol, and (very expensive) nano-printed goods.