Divergent had some great stuff in it about how facing your fears isn't something you do that one time, it's something you keep on doing until you're not just sick of it, you're bored with it and how sometimes people become bullies out of weakness and sometimes out of strength but either way you don't have to forgive them and some fun worldbuilding. On the other hand there is also some weird, annoying fat-shaming which meant I didn't bother picking up the sequels.