Quoted from PanzerFreak:There are pins that have modes where the player is forced to hit the same shot over and over again. I think that's repetitive and boring.
In GNR you are shooting rotating shots (as on a majority of pins) but there's a set number of them per song, the shot requirements can change as you progress through a song (or collect a song jackpot to stop), and there's mode choreography (animations, music, sound effects, etc) being played as shots are made.
The shot requirements in GNR change by song, and each has a sense of stages as shot requirements change as the song is played through. Each song can be played a multiball or single ball mode, it's up to the player adding another layer of depth. That's entirely different and unique compared to a majority of main modes in say ACDC or Metallica that has a player bashing the same shot over and over again with the same single animation playing. Hit the ramp 10x, hit the orbit 10x, hit the snake 10x...ugh.
For Metallica specifically, I used to think that was what it was about too. It has some pretty great depth with regards to strategy actually. Combos, stacking, Crank it Up, Justice, and all those things can be done in ways that can save shots, get multipliers, etc. I am still learning it now that it is back in my house for the second time.