Mea culpa, I shouldn't have said there is no key of G#, but rather that it's a ridiculous nightmare to use. I don't see that C# is any better. In Banjo Johnny's latest example, why not start in Db and modulate to Ab? Is there any actual good reason to write something in the key of C# or G#, or Cb as mentioned by Nicole? Right now I'm thinking either I'm ignorant--certainly possible, educate me--or those composers are jackasses.

Who, me, opinionated?