Some of you may find that unbelievable, some may not. I'm not a musician, merely a member of the audience, and therefore I look at things from an entirely different perspective to some

(I seem to be disagreeing with Ralph a bit here but...)

Lizzie, many occupy both positions. Some may be professional performers and listeners. Others may be found hiding in sessions, singarounds and be listeners. Some may even be found performing, "hiding" say in a session and listeners! The positions need not be exclusive, nor should your position as just a listener be taken to mean someone who sings and plays might not have also have a lister perspective... it's quite possible it was being a listener that inspired them to learn the other bits.