What makes aa song understandable is what I would say is the most interesting aspect. rhythms come from different places but nobody seems to talk about where particular rhythms come from. That would be interesting to force your friends to be interested in. That is one aspect of the music schools that frustrates me. They spend no time at all on an overview of well-recognized rhythms having come from certain era's, locations, islands or things like that. I think Celebrity is stupid and rhythm by influence of a place or time is much more interesting to me. Especially in instrumental music. If you can read the separate rhythms in poly it is almost like listening to a story. And you can form your own musical persona personality because you are a witness to that.