John Ringo books have horrible cover art, fairly stock characters, and a pretty basic writing style, but they have very ammusing settings and technologies.
And most importantly the characters despite being stock are enjoyable to read and people you care about and come up with interesting "solutions".
Very pulpy, and a fun way to have your brain go all idle and read about aliens.
A good break from reading various political/historical books, or just blogs, about how we're all doomed.
So far of Ringo's books I've read the Looking Glass series, The Last Centurion, Von Neumann's War, and am reading the March Upcountry series.
I can't speak for the other series he's wrote (or at least cowrote), but those are some plain scifi fun.
I'll go into each in more detail, but I figured something was better than nothing.