". However, it certainly seems to be true that the more black notes you have, the more the piece chimes or jingles. I think most people would perceive the blacker keys as sweeter."

That's because the '12 tone equal tempermanent' is BASED on C.... :-)

And if you don't understand THAT - I can't explain it without lots of hand waving - at least not easily in words - and my maths is not very good these days.... I could do it on a blackboard with drawings though.... :-)