A Minor is one of my all-time favorite keys to play in. It's a very moody key, and also 'A' is the first letter of my name. It just represents the songs through my eyes.
I don't know what makes a guy want to write songs and sing, but if you've got a message, you want to get it across. When I come up with an idea about the way I feel, I can really state it strongly in a song.