I finished Ignition! and am about to start The Player of Games from the Culture series. I really enjoyed Consider Phlebas, but I’ve been trying to switch off between fiction and nonfiction.
I only noticed this comment now, I've been reading the Culture series too - I enjoyed the world building in Consider Phlebas a lot but after a while I just wanted it to finish. So I skipped on and read a few others in the series then came back to finish it.