I find it very giving to try to do portrait-style live concert photography. To go closer and to isolate other stuff happening on stage. It’s usually a bad idea because you need a good tele (I use a Canon 70-200 2.8 L or a Canon 135 L) in horrible light. But when you nail it its worth it.
I’ve created a small collection of closeups. (Top photo: James Blake, Øya 2013)