Another consideration is that people often cut-n-paste to plain-text files (etc.), where any special formatting you used gets lost.

For example, Bill's chording string would end up looking like "DownD in the valleyG, valley so lowD". (Note also that, by intuitive convention, chords should precede words: "DDown in the Gvalley, valley so Dlow.") A possible solution Here would be to enclose the chords in parentheses as well as superscripting.

In general, though, one should not rely on special formatting, but rather, ensure text will still appear correct without it.