I still love the stuff I started out with, one of my guilty pleasures (80s pop/rock).
In the beginning it was Michael Jackson's Thriller (damn straight), Billy Idol's Rebel Yell, Rockwell.
That led to Night Ranger, Starship, Steve Miller, Motley Crue, Def Leppard.
Then things kicked up to Dokken, and the first real "wtf" moment was a buddy who brought Metallica's Ride the Lightning cassette, which we jammed to in the big ol boom box, while riding our BMX bikes in the street haha.
From there it was everything Metal, obscure to mainstream - we checked it all out. Some of the stepping stones would probably be albums like Fifth Angel - S/T, King Diamond - Abigail, Queensryche - Rage for Order, David Lee Roth - Eat Em and Smile, Malice, Sword, Forbidden, Testament, Cacophony, Helloween - we weren't so much into the Cannibal Corpse super grind type stuff.
It took me a while to appreciate the "cookie monster" stuff but Opeth's Still Life was a big player in that. Symphony X - Damnation Game, Threshold - Psychedelecatessan, Stratovarius - Dreamspace were a few that started my "new era" evolution... so much killer stuff out there, much more than there was in the 80s/90s.