I have favorite keys, especially on guitar, but I think that certain genres gravitate toward certain keys.

Blues works best in E because it's the easiest key for guitar shuffles because you can use the open Low E string and the open A string. D is a good blues key if you want to use either a drop D tuning or an Open D (Vestapol) which can be tuned up to an Open E Vestapol on the electric. Same goes for Open G (Spanish) tuning/open A on electric.

I wrote most of my other songs in D. When I started writing more Country, Bluegrass, and Southern Gospel I started writing them mostly in G.

Chris Jay Becker
Hallelujah Street Music