bb king vibrato

[Otto]

I was just wondering what makes the bb king vibrato so good. When I go for a vibrato i just basically shake my hand perpendicular to the fretboard. I know a lot of other guys do it the bb king way, so should i learn it too?

[Bongo Boy]

Over fifty years of playing has got to help.

I've practiced his 'butterfly' style only a few times and it seems like a lot of fun--but clearly will take a LOT of practice to attain both speed and control. Actually, any vibrato style will be a lot of work for me, but I think to get just what you want when you want it in a 'fluid' way has got to be even more work.