Do you like to listen to a capella songs? I feel complete when all musical instruments are available, but at times I enjoy the simplicity of a capella arrangements. It is entertaining to see humans mimicking the sound of instruments, giving certain depth to the songs.
I recently found Pentatonix, a successful a capella group who has produced many cover and original songs. Their arrangements simply make you wonder how far humans can go with music when instruments are not available.