For FFXIII, I like the idea of giving the 360 version a different score than the PS3 version. So I'll probably go with 88% 360 and 90% PS3.
For ME2, nothing lower than 91% for sure. It'll probably get 92% on 360 and 93% on PC.
Random game thought :
Why is Bionic Commando Rearmed 2 getting so much hate? We finally get a real game and they're not even satisfied... I'm starting to hate the gaming community so f****** much...