Not criticizing but I don't see how a musician can think like that. Even allowing for what Dave is saying (which I happen to agree with), I would think a musician would want the ABILITY to play in all keys. What if you played a horn (sax, trumpet, flute, whatever) or ANYthing other than a guitar w/capo or electronic keyboard with transpose button. Truth is, if you're playing with other players and you can only play in C, you're forcing THEM to transpose. But, to each his own.

chas