I think everybody has a natural resonating tone. What key do you speak in? For me, I speak in the key of E and the lowest possible tone I can create with good resonance is A. It's no surprise to me that my music sounds best to me when I play in those two keys.
I can really hear the diffence when I blow through and amp. E especially sounds great and it doesn't matter what style of music I am playing....
-- Hear Barrelhouse Solly on the internet--that's me