I think the way you present yourself makes the main impression on the audeince. I mean you can have Vai on stage, but if he looks like he's having a crap time so will the audience. Then again you can have some 12 year old on stage attempting smells like teen spirit and having a great time and it'll kick ass.

If I have a bad gig I just keep smiling and don't concentrate on the bad note I just hit, just concentrate on the good one I hit afterwards.

- J