After reading Divergent, I can't say I expected much from Insurgent. But - I actually liked this one more than the first one. Some things are finally starting to make sense, we learn more about the system, the factions (even though I still think they're pointless, just as the Dauntless are)..
To me, Insurgent was more interesting than the Divergent; it's fast paced, it has a lot of action.. I liked it. What I didn't like is Tris. I didn't like her in Divergent, and now I like her even less. She just made so many stupid decisions; she really annoyed me. Tris is one of those characters I guess I'll never like.
These books are interesting, I read them because they entertain me, but they don't have the same depth as the Hunger Games, dystopia in THG has much more sense..
BUT, I will definitely read the third book and hope for something awesome that will justify all this.