I'm a music lover in my mid to late fifties. To me, the most important aspect of a music pin is to be able to listen to the music and at the same time have it make sense during pinball play. Because of this, I really like some music pins like ACDC, and Elvis, find some like Metalica to be mediocre, and many to just stink like GNR and Rolling Stones (both one and two).
Unfortunately, Heavy Metal bands from my time, (Black Sabbath, Alice Cooper, Judas Priest, Motorhead) just won't stand alone as a pin. There's just not enough music to make a satisfactory game, unless a bunch of these bands got combined into one game. More mainstream bands like Aerosmith and Van Halen might be a possibility, but just not headbanging enough.
But Maiden. I still go to every concert they give in the DC area. I take my son, and if the music gods allow, will take a grandson someday. A Maiden pin would be awesome. Lots of music. Lots of art. Lots of Eddie toys Lots of memories. I'd sell my 67 GTO to pay for a Maiden pin.....