I'm not currently reading anything at the moment, but I recently finished Larry Correia's Monster Hunter International.
It wasn't a bad book, but it left me somewhat lukewarm. I'd heard that, as his first published work, it was somewhat rough compared to his later material, so I'll probably check out the next book in the series at some point.
As it stands, I'm having a hard time pinpointing exactly why the book didn't make a better impression on me. While there were some aspects of the book that weren't personally appealing to me - the "gun-porn" aspects of the book, for example, or the story's (and main character's) libertarian attitudes - those weren't particularly off-putting. Rather, it feels like an issue of pacing; it was like the dials kept suddenly ratcheting up to 11 before falling back to a 4, and then suddenly turning up to 11 again - there wasn't build-up, so much as there were briefs periods of characterization and exposition between high-action scenes.