Let's see. Most memorable metal concert... Nuclear Assault in some dark warehouse called the Bayside Expo center in Dorchester MA, Boston, December 14th, 1988 (Holiday Thrash Bash). They put on a show with Manowar, Meliah Rage, and Hades. Awesome show! Anyone else here remember that one?
Saw Pantera just one time too many in the early 80's as well. Them guys lived on the road for years.
Still like Iron Maiden, Queensryche, Whitesnake, Sammy Hagar, Judas Priest, Blue Oyster Cult, Ronnie James Dio, and Twisted Sister as well. Listened to Ministry and Front 242 in the early 80's as well, before they went mainstream.
All time favorite metal song...
Swords & Tequila from Riot. Narita 1979
Haven't listened to metal much over the last few years though. I liked a few songs off the XXX album.