The problem is, most people don't even notice. There's an old saying, "Don't miss the forest from the trees." Well, musically, I am saying don't miss the trees. We spend so much time on the big picture of a song: the melody, structure, chords, etc. that we miss the fine details that make a song great. All we see is the forest and miss the beauty of the trees.
For musicians, it is good practice to sit down and listen for every part of a song, not just your part, if you're even hearing that all the time. Listen for the keyboard line in the chorus, or that cool bass riff in the bridge, or that harmony vocal line that is mixed way in the background. It fine tunes your ear and also makes you more unified with your band. As a leader, it helps you to make sure everything is coming together the way it should.
As a listener, listen for those same parts. It will open up the song in a brand new way, letting you hear things you've never noticed before, giving you a whole new perspective on a song that you already loved. It will make the listening experience so much more enjoyable. We spend a lot of time writing these parts, laboring over every note, so we want you to enjoy them.
Music today has turned very shallow, and it isn't always the musicians' fault. People just don't appreciate music the way they used to. Just because it is rock and roll doesn't mean it can't be as beautiful as a symphony. Start enjoying music again. It will change the way you look at the trees.