Actually, if I was to see Metallica live again I'd either want to see them around Master of Puppets era or now. Master of Puppets era is because that was my favorite album by them and probably the best chance I would have had to see them play stuff I love and avoid the latter stuff (because it wouldn't have been written at that point
). Now because they seemed to have reached the stage in their career where they've embraced their past more, so the chances of me seeing those older songs live is greater.