You might like Asimov's Foundation series (space opera, like Star Wars).
John Scalzi's Old Man's War series (military sci-fi with a sense of humor) or his book Android's Dream (which I hated because I thought the humor ruined it).
The Oracle series by Mike Resnick was a quick, fun space operaish read.
Other space operas:
http://en.wikipedia.org/wiki/List_of_space_opera_media