Ugh Fallout 3's karma system was so broken. "Oh I see you nuked an entire town and have ruthlessly exterminated half of the wasteland population, but you gave that guy like 7 bottles of water so you're miraculously a beacon of hope to all." Also the non-dlc ending made me want to adopt a litter of kittens and throw them into a woodchipper. I've yet to play through Broken Steel though, so the jury's still out on the 'final' ending.