I'm curious what you all think I've missed.
Mars Trilogy by Kim Stanley Robinson (3 novels)
So - recommendations, opinions, other series to share?
Here's one for you: The Martians is sort of a fourth book in this series. It's on my "to read" shelf also, so I can't tell you much about it (saving you from spoilers, and whatnot.), but I do know that it has earlier drafts of chapters from the first three novels, as well as short stories (at least one) continuing the story, and other information.
I don't know if you'd be interested in that, but I figured it was relevant.