Dr. Horrible's Sing Along Blog has been a big hit with my family since...well...ever. Joss Whedon is a genius storyteller and a master of craft. Of all the songs, this one gets stuck in my head the most. I like it because it is both bitter and hopeful simultaneously, so encompasses a span of emotions. And it seems to be in my natural singing range, so I can sing along with it fairly comfortably.
To me, this song is also about the choices we make, and how the perspective we choose to take influences the way we experience the world. We've all been both places, but it's up to each of us to decide where to stay.