The sound of a Cox .010 excites me. For me any (decent) glow engine running creates an air of anticipation and excitement. Other than Moki radials, most gas engines sound boring to my ears. Not to say they don't do the job well, they do, but as to sound..ho hum. Perhaps the only thing less exciting is watching large gassers hover. To each his own.
You said it right, what for some is the most annoying thing on earth (.010 for example) for others is music from the heavens. That is the nice thing of this hobby.
Gerry