I figured it was time to revamp the Science Fiction recommendation thread to follow a similar method used in the Fantasy Recommendation thread. Here I’ll list some popular topics where you can find a wealth of reading suggestions, likely more than you’ll ever need.

Ground rules:
This thread will be open for discussion
If you have a question about an author or book, you can ask it here
If you recommend a book, please give the author's full name and the full titleSome of the popular few threads dedicated to them, so I’ve listed a few towards the end of this post. Failing that, plunk their name in the SEARCH function to see what others have said about these popular authors.

Some of our Moderators are also "Official" book reviewers for the site, so check out SFFWorld’s Official Reviews Page, updated at least once a week with a new review

Two of the more popular sub-genres of Science Fiction are Military Science Fiction and Space Opera. As such, we have many threads discussing the authors, books and what make up these subsets:

SPACE OPERA
Epic SF and Space Opera: Here's my giant list, what's missing?
I'm running out of space operas!
Space Opera recommendations?
Best Space Opera
Recommendations for political space opera?

MILITARY SCIENCE FICTION
Military Science Fiction (Merge of 3 threads)
Militaristic SF with 1 POV of a powerful character?
Need more military sci-fi series'

Some of the popular authors
David Weber
Weber, Bujold, Moon, Cherryh - Comparable?
John Ringo
io9 article: Is Bujold "hard sci-fi"?
The Vorkosigan Saga by Lois McMaster Bujold
What do people think of Miles and Honor? (Miles Vorkisgan is a Bujold creation and Honor Harrington is a David Weber creation)
Peter F. Hamilton...where to start?
Alastair Reynolds (1)
Alastair Reynolds (2)
What series to choose from: (Alastair Reynolds, John Scalzi, Richard Morgan)
The Uplift Saga by David Brin

Some other helpful threads
Free SF ebooks
What Can You Tell Me About...SF Remix
Underrated sci-fi books
Science Fiction Virgin!
Who are the hottest authors in SF right now?
I Just Bought... SF Remix Volume 3
The World After the Post-Apocalypse
Post-apocalypse books
Hard Science Fiction About Space Exploration
Top Ten Science Fiction Books of All Time
2012 Upcoming Releases-Science Fiction
The advantages of secondhand bookshops
The old SF Recommendation Thread: Recommendations

Again, this is an OPEN thread, so come here to find and provide recommendations! Also, please don’t hesitate to start up new threads on particular subjects or authors in the Fantasy/Horror forum or just add to existing threads you find interesting. We want this thread to be active, lively, and un-daunting. Recommendations became. We'll keep this initial post relatively brief and continually update as we see fit.

Always check into the Reading in… threads where members post daily what they’re reading