Q: how do you keep choruses interesting, even after many repeats?
A: run through it, from the beginning, in real time, and listen to it as if you are hearing it for the first time. be very aware at every microsecond of whether you think it's getting boring. if you feel it getting boring at a certain place, start trying to find a different way to proceed from that moment. always keep doing at-tempo run throughs to check. each microsecond is an opportunity to go in a different direction. you don't have to wait until the end or beginning of a section. time is ticking