I think it is pretty logic any player of anything, given the choise will compose in what is known to be the key they have the best range. I nearly always go for E or E minor on both keyboard or guitar. On Banjo I go for G. On balaaike I am back to E.
On lap steel I go for G at the moment simply because i got talked into putting heavy strings on it and it sounded ugly tuned to D, so slack tuned to g and like it good enough to get the full use out of the strings.
I prefer anything destined to have harp on it to be in G as to my ear that is the key harp sounds best in most often.
Closely followeds by E. Just a tonal thing.
Using C and A cross harps respectfully
Graham


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