I had read Divergent some time back, but at some point, I decided to watch the movie and that got me started with dystopian young adult fiction.
I read the rest of Divergent, then Ashes, Ashes (which I think has the coolest name of all of them) and then I started the Razorland Saga. I just finished it last night and it was really good, my favorite of all of the young adult dystopia ones so far, including Hunger Games.
I am not sure if I have the energy to start another one, but I have got The Darkest Minds and Unwind here from the library right now. :-)