I like to draw a (rather pretentious) delineation between music and songs, the archetypal examples being, say Beethoven's fifth symphony and "Call Me Maybe". (As a side note, I very much consider it possible for something to both be a "song" and "music") I enjoy music because I played a few instruments and sang when I was younger, so I know enough musical theory to appreciate the artistry it took to come up with the structure in the music, and (when appropriate) lyrics.

Contrarily, I enjoy songs (although happen to hate "Call Me Maybe") because they're fun and upbeat and keep me in a positive mood. You can find a song to fit most moods, and fitting them very closely is a very satisfying feeling. Once last week, I was in a very relaxed mood on my way home and set on repeat, because it fit how I was feeling very exactly. It was probably the happiest I have been in the last week. Additionally, sometimes songs have the ability to change my mood and/or motivate me to work harder, and I often exploit them for this purpose.