One third of a record is played every night.
I don't know the criteria by which the songs were chosen, they could be easier to sing or fans respond to it better or whatever, but they are what they are.
Every song has been played, with the exception of Riad, but that was played back in 2001/2002.
I wonder when Guns toured Illusions if there was so much complaining, despite a decent amount of UYI songs, why Get In The Ring, Don't Damn Me, Breakdown, Coma, Locomotive, Back Off Bitch, The Garden, Garden Of Eden, Shotgun Blues, Don't Cry (alt.) aren't being played regularly. Most of these songs have been played a handful of times in their entire career and some never.
A typical GN'R fan is programmed to be unsatisfied.