As far as Live perfomance goes... what do you think is most important?

I´m comming from the HC point of view:

IMO if you want to listen to music, a good stereo is the way to go.

If you want to feel the energy of the music then the live-show is my choice.

I dont want to see the band plays 100% tight but standing on the stage with no movement.

I want to see a band go crazy and celibrating with the crowd!!!
I dont give a fuck if it is tight or not (besides the drums, the drum-guys are sitting so I expect them to be tight). I love it when frontman/frontgirls go stagediving and throwing the mic in the crowd so the crowd sings-along

IMO it is all about the show