Hey all. I'm getting kind of burnt out on fantasy and have not read sci-fi in a long while. I don't recall the last sci-fi I did read but I tend to sway towards space opera with darker themes. Perhaps my favorite is Donaldson's Gap Series. I have also read Banks and Reynolds and enjoyed them, but perhaps not as much as the Gap series. I guess I'm looking for darker, gritty sci-fi. Any good suggestions come to mind?