Being a musician myself, this is an interesting question I've always wondered about -
Should bands/solo-artists try to replicate their recorded work note-by-note? Or should they loosen up and make it simpler/different so that it suits better to a live setting?
On one side, you have guys like Arcade Fire, RATM and Linkin Park, who try their best to play the song exactly like the studio version. Even the "wierd"/unusual instruments used in the studio are brought out to the live setting to try and replicate that sound.
But then you have bands like Nine Inch Nails, Muse and Radiohead, who change up the sound so that it can be played easier live (without worrying about recreating the "exact" electronic bleeps and all that) and can be enjoyed more by the fans and the band themselves. Also, it makes the live experience more interesting because everyone gets to hear a "different" version.
What kind of performance do you guys prefer?