dronfield
Newbie
I did manage to see Joe two years ago doing another G3, this time with John Petrucci and Uli John Roth. The separate sets were really good although Uli John was a bit loud. As far as practice goes, Joe taught both Steve Vai and Kirk Hammett, and i think it was Steve who was renowned for practicing ten hours a day, not saying that Joe didn't do a bit here and there.
You are right, it was Vai rather than Satriani who was practicing 10 hours a day - the other guitarist they had when i saw them was Malmsteen, plus Robert Fripp as support.
From a "instrumental" rock music perspective, i think Jeff Beck is my favourite - quite a bit of variety across his stuff, plus obviously a fantastic guitarist. His new album has Johnny Depp on vocals.