completed fallout 3 on the ps3 including the addons a while back. Very good game bar the glitching/freezing which is more common the further into the game you get. Currently going through the FO3 new vegas at the moment and only had 1 freeze. Been pretty straightforward and the same as before so no complaints. Playing skyrim on pc and found the game fun for a while but i have hit lvl 38 and now with about 68 hours plaed and have the best armour etc and can't find anything else fun to do in it. Good games to pass the time but for me it's Battlefield 3 which is taking up my time. As for the FO3 comment the only differences i found was that new vegas seems to have invisible walls in certain areas so you cannot jump over rocks etc and the graphics look a little poor.

Haven't played dark souls so can't comment on it.