That's interesting, Dan. I've never played much blues...don't know much about those kind of riffs. When I do a 12 bar blues pattern it comes out more like a folk/blues crossover. I leave the pure blues to them that know how to play it. ;-) Same goes for harmonica. I normally play melodies, harmonies, standard chording, and countermelodies on harmonica....not blues style riffs. My main influences were trad folk, contemporary folk, Hispanic music, and classical music rather than the blues.