After watching it on TV, I noticed that the majority of the play is normal Broadway singing, not rap or hip hop. That didn't dawn on me watching it live.
Sorry if this was posted already. There have been a couple mentions of the choreography of the show, and how there is constant activity going on with the ensemble cast members. What I always enjoy watching what the other actors are doing, since the ensemble often carries the show, I haven't spent much time trying to interpret their actions. Here's a nice article on the cast member that plays the "Bullet" throughout the show. I'm sure there is something purposeful behind many other movements as well.