Re: Vibrato
If you get a chance, watch BB shake a note. His whole hand moves, pivoting on his thumb. The motion comes from the wrist and forearm, kind of like if you are pouring a drink.
Some people don't like his vibrato, but another guy to check out is Angus Young. He has a real wide controlled vibrato, that is immediately recognizable. I would also suggest Michael Schenker's playing too; of course he got a lot from Leslie West...
Indeed if you were to make a list of peole whose playing you could identify by one or two notes, very often it would be from the vibrato.