As a complete non musician (barring two years of high school viola) with many music friends these are my uneducated two cents. I think these things create the vibe and signature of an artist or composer.
Instruments kinda translates to color, the palette you're working with. Tempo sets the vibe, lighting. Lyrics are not always there of course but I feel like they can drastically change vibe so I would include it but I'm sure some people would not.
