I strongly recommend FOOK (Its actually FOOK2). It adds a ton of new features, including over 150 new weapons, 70 (I think) new armors, and a ton of realism and other general tweaks. It honestly completely changes the game. Its comes with its own installer so its very easy to use. It may make the game harder because it improves how effective guns are (remember, a pistol, no matter how small, still shoots bullets). But since you've played through the whole game, it shouldnt be a problem for you. It also fixes repair by making similar items repair. You can find this mod at www.fookunity.com . If you're interested in a completely different style of play, I recommend Zombie Apocalypse. It adds 26 000 zombies to the game world. Good Luck :P. Its quite fun, and can become a real challenge. You can find that here: http://fallout3nexus.com/downloads/file.php?id=10346 . Enjoy :D