I know this may sound (Pun intended here) like a strange concept, but I'd love to see a pinball machine where you make your own music. You set the tempo, and can change it during the game, or modes do.
Example: Spinner adds a shaker sound. Targets add piano or synth. Ramps add electric guitar. pop bumpers, base line. Or something like that.
I know its a little out there. But I'm never been accused of being 100% normal.
-Aaron
Iowa Pinball Club Member