I came across some folks shootin' some fleein' folks so I figured that I would protect the remaining folk being shot at.
Turns out I killed a couple of deputies and aided a crook (briefly)
Also: Finally a GTA game which does trains perfectly. You can sit and get cinematic stuff going on, or you can dick around on the roof or whatever. I managed to screw up a rooftop jump because of a slight curve in the track, fell to the ground, and managed to hop back onto the train on one of those open-door boxcars. I truly felt awesome as I climbed back to the passenger car and calmly sat back down
Basically my opinion so far isyes.