Why are you playing this song?

Based on what you've told us so far, we're playing this track because it features hard rock roots, a subtle use of vocal harmony, mild rhythmic syncopation and extensive vamping.

I can just keep feeding in bands I like and take the convergence of what it tells me and finally know what it is that links all the music I like. I think my musical tastes are sufficiently simple for that to work, although I still don't know what extensive vamping is and only have the slightest grasp on the concept of synopation.