Mine has always been 0% (= disabled) (PCM is out of a VX/SS).
I noticed all LS1's in Vettes and HSV's (Holden Special Vehicles) have it set at 1.5% and LS1's in regular Holden's are set at 0%.. so naturally, I want to emulate the more "special" cars settings.

Can someone tell me if it would be a good idea if I set mine to 1% (my throttle is 0% at idle), considering my VE isn't properly tuned (though smooth) and my MAF is, or am I better off just leaving it? Would it mess up my fuel trims a bit? Would it smooth things out a bit?
I'm done trying to make sense of it all and figure out what would be best.