I was playing Fallout: NV last night, trying to blast though it quickly as I couldn't be arsed putting in another 200 hours like I did Fallout 3 and then I realized it had become more like hard work and so gave up on trying to 100% it. Theres so much to play now a days its simply not worth trying to chase every single achivement, especially those were you have to play it in a less enjoyable way. For example in NV theres achievements for different weapon styles and I got the Sword one and then thought "well now I have to change weapon to get the others... but hang on a second I WANT to keep using my swords... **** the achievements!" lol.