Best Iron Maiden Opening Album Cut

the piper at the gates of dawn is calling you his way

I luv "invaders." a terrific opener for their greatest album, yet i I don't get why its not at all popular with fans and the band itself. Maybe this has changed, but last I checked the band had only played on the Beast tour in '82/'83. Is it that the song is just too Maiden for Maiden?

"only played it"