I hope this isn't against the sub rules. If it's relevant, so far I've read The player of games, Consider Phlebas, Use of weapons and Look to windward, in that order. Of these, I think Use of Weapons is my least favorite. I recently finished Look to windward and I really enjoyed it.

Since I haven't read any of the two books, plesse keep the comments free of major spoilers. Can't wait to start the new book!

Edit: I suppose this post is buried by now, but I want to thank all of those who took the time to comment. I looks like the public here is split 50/50. It's great to see people being passionate about their books and I love how everyone liked different things about these too. I started reading Excession and I'm loving it so far.