He developed the skills typically used in hard rock and heavy metal. His music doesn't typically follow blues progression, nor apply blues scale. His pioneered guitar tapping and utilizing feedback. If you watch Back to the Future, when Marty McFly played, of course it Michael J. Fox didn't actually play that, guitar, the first portion was Blues, then he started getting crazy, and that part was not blues at all. That part was actually Eddie Van Halen's guitar style.