Watch the Billy Gibbons online guitar lesson by Jeff McErlain from Kings of Tone
Billy Gibbons is deeply steeped in the blues and so should you be! The vocabulary gained from a solid background in the blues is invaluable to any rock guitar player, actually ANY guitar player! The guitar is the instrument of the blues, it has quality that can be similar to that of the human voice (in the right hands). It can be subtle an delicate to raging and loud and everything in between. So you owe it to yourself to go back in time and check out the old blues masters. I would start with Charley Patton, it can be rough on the ears at first, but man... it's all there.