If it's extreme metal, I want to see them un-gracefully moshing because it looks stupid to watch them play this evil fast music and have them standing there all still and shit. But otherwise, I don't care, even though I would like to see them move a little bit, and as long as they don't mess up too much I don't care because you get recordings for perfection, a show is meant to be a place where you have a good time while a band you like plays music.