I was fortunate enough to see a lot of the bands mentioned here in their heyday, including many of my favorites. Some of those shows include:
-Def Leppard: Some of the shows included seeing them on the Hysteria tour with Tesla opening, and seeing them again on the Adrenalize tour, which was VERY similar to the Hysteria tour, with a few new songs thrown in and Vivian Campbell on guitar.
-Y&T: MANY times--can't even remember all the shows. But a couple of the memorable ones were seeing them on Halloween at the Concord Pavillion with Faster Pussycat opening (if I remember correctly), and this being either the first show or one of the first where Jimmy DeGrasso played with them; and a show at the Omni in Oakland where they played a sampling of songs they had written for their next album and conducted a fan poll at the show to help them figure out which ones to include on the album.
-Whitesnake: Saw them on the Slide It In tour as the second act of a show opened by Kick Axe and closed out by Quiet Riot. Saw them again on the s/t tour as the third act at Day on the Green, where the roster was Jetboy, Poison, Whitesnake, Motley Crue. Saw them again on the Slip of the Tongue tour, I think with Faster Pussycat opening.
-Scorpions: A bit late to the game with them live, as I only got to see them on the Face the Heat tour. But I loved that album, and they played some new cuts from that, plus a lot of classic era songs, so it was a great set list for me.
-Tesla: Despite now living in their hometown, I have only seen them three times: once on the afore-mentioned Def Leppard Hysteria tour, and then much later in the 2000's.