For sure - I like the crowd noises - especially how it changes when more people show up. This is most evident if you are doing a hunt train and as more people arrive it sounds like the crowd swells.
I haven't had music performance sounds on for a long time because when that first came out for every excellent performance that was worth stopping what you were doing and listening in, there were 50 other people mashing keys to make seemingly random noise. They still get to do that and perfect their craft or mess around wherever they happen to be, and I get my regular game sounds back. Win-win.
That and I still have the opportunity to turn it back on when I see a crowd gathered around an obviously coordinated musical group/piece.