Since I got the PS3, it's all been a little underwhelming.  Resistance wasn't quite as much fun as I'd hoped and didn't 'feel' right for some reason.  MGS4 reminded me why I skipped 2 and 3.  My favourite game on the system is easily Burnout Paradise (which I could have got for the 360) and they're going to do trophies retroactively.  Which, by the way, is really fantastic.  Those guys have got their gear in order.