Jimi Hendrix but that's because I just starting playing guitar again after ages. I listen to all sorts but the old blues stuff including Hendrix is where I always start from. That stuff is pure soul unlike todays music. I've spent years messing with audio software but nothing compares to playing a real instrument or listening to that kind of music. Computers aided music in many ways but also destroyed it. Going back to listen to old music now makes that radically apparent.