Marts Mutant Mod - http://fallout3.nexusmods.com/mods/3211/? More variety of enemies, spawning system, AI and drops. Sydney Follower - http://fallout3.nexusmods.com/mods/9320/? Adds Sydney as a permanent follower, plus expands her options well beyond default followers. Best thing about it is the trouble to which it's creator has gone to give the NPC a memorable personality. Highly recommended. Kerberos Gear _Chinese Heavy Armor - http://fallout3.nexusmods.com/mods/14349/? Armour from the anime Jin-Roh: Wolf Brigade. Very cool. Pipboy readius - http://fallout3.nexusmods.com/mods/12144/? Looks cool. Also removes the pipboy from your character's arm. Robco Certified - http://fallout3.nexusmods.com/mods/712/? You can build robots and use them as followers. Never used it myself, but it looks pretty cool. Japanese Power Armor Set - http://fallout3.nexusmods.com/mods/5757/? Always loved this armour. Cube Experimental - http://fallout3.nexusmods.com/mods/6270//? Excellent quest mod that's practically a full game in itself. Very reminescent of a Valve game such as portal. Also highly recommended. Enclave Commander 090 - http://fallout3.nexusmods.com/mods/1410/? Pure fun. Firefly Ranch - Scary Quest Edition - http://fallout3.nexusmods.com/mods/9420//? Adds a player home plus a quest to go along with it. The quest is the main draw here as the house itself is not particularily interesting. Very atmospheric. There is one very tense moment which is handled excellently. I'd recommend you do the quest without companions. Devoured In Darkness - http://fallout3.nexusmods.com/mods/10361/? Another horror-themed quest. More puzzle-based. You may need to read the comments section of the mod for solutions, as they are not intuitive. Otherwise pretty good. I wouldn't recommend the pucemoose quest mods as they are mostly tedious key-hunts with a lot of note reading, but it's up to you. Alexscorpion_Sniper_Gear_1_2-4362 - http://fallout3.nexusmods.com/mods/12678/? Adds a heavy-duty anti-materiel sniper rifle, the Barrett m82a1, plus a pp-2000 smg, all in various colours. HK PSG1 Sniper Rifle - http://fallout3.nexusmods.com/mods/6100/? The gun Snake used in MGS 1. My fav. I love my sniper rifles. In the same vein.... Artorps Zooming Scoped Weapons - http://fallout3.nexusmods.com/mods/5351/? You can zoom in further than normal. US UK RU Stealth Armors - Non-Replacing - http://fallout3.nexusmods.com/mods/5481/? Some extra camo-pattern stealth armours, with or without separate helmets. Alpha-C-ev Underwater Home - http://fallout3.nexusmods.com/mods/15135/? A very stylish player home inside Rivet City. Can't think of anything else at the moment....