Music is basically sound moving through time, and an effective handling of time is one of the hallmarks of compositional greatness. Yet, there are some very great composers whose feeling for musical timing was demonstrably defective: Liszt, Rimsky-Korsakov, and Richard Strauss among them. Have a look at this chat, and please feel free to let me have your picks for composers, or specific works, that we love despite their awkward tendency to take lots more time than they have any right to.
