Just read the first 3 of Scalzi's "Old Man's War" series and really enjoyed it. Fairly easy read, quite human story. Bought the fourth but it's stylistically different enough I'm not sure I want to continue (I only just started it, but the first 3 books were such a nicely finished trilogy that I'm not sure what the rest of the series can add.)
Currently reading Hamilton's "Pandora's Star" - definitely harder sci-fi, goes into probably too much detail describing just about everything. I find myself skimming over paragraphs at a time where it's just description that doesn't have any affect on plot (but at the same time I'm incredibly impressed at the amount of detail that he's thought through in creating his worlds). I'm 80% through; will see what I think when I finish. Do find the writing to be very clever, this is almost a grand epic of a book; so many different but converging plot lines, such diversity in imagination of worlds, species, motivations, and some fun humor tucked in there. I'm enjoying it, just need to decide if it's good or great.