I agree with you that blues can come from different emotions from different people. I dont think ive ever heard a happy blues song (kind of a contradiction in terms), so the lirycs usually deppict unhappy times or events.
It was once believed that sneazing was a way of expelling the devil from the soul (hence the usual reply god bless you), and i think that similarly blues music is a way of expressing and therefore expelling unhappy demons from bad times past.
i remember hearing words to a blues song about a man losing his job, then his lover leaves him, then on top of that his dog leaves him. There cant be a person out there who hasnt experienced something like this, or worse.
So, in my eyes everyone has a blues demon needing to be exorcised
Please pardon my rambling, but as a white british father of two, i have often wondered where my urge and desire to play blues has come from, and so have given the subject much thought.
REDEYE
LIFE IS A SHORT JOURNEY, SO DONT TAKE THE BUS, WALK AND SMELL THE FLOWERS.!!