I've seen a lot, but those that stand out...
AC/DC Highway to Hell in Neunkirchen, Germany. Had never seen a band with that much energy.
AC/DC Back in Black, same venue. Surprised how quick and strong they came back after Bon's death.
Us Festival San Berdoo. 3 days, lots of bands, Clash, VH, Bowie, U2, INXS, English Beat, Triumph, Scorpions, Wall of Voodoo, a lot of music.
Led Zepplin Neunkirchen, Germany. Bonham passed out after 3 songs and they canceled the show. Our tickets were good for Munich so we saw them there with Simon Kirk from Bad Company on the drums. Bonham died shortly after. Here's a photo from the show with Bonham...