Over in the Dave's Picks 12 thread, there's a discussion going on about people's first concerts, with some great stories attached. Rolling Stones! KISS! Yanni! And yet, here we all are.
This got me to thinking that there were probably equally great stories attached to shows we're still bummed about missing--whether because we weren't born yet or just couldn't make it at the time. These days there are many recordings of all kinds of live performances; which ones make you wish you'd been there? Dead shows, not Dead shows. Any era whose music you like...