i dont have fallout 3 installed anymore but the only way to enjoy fallout 3 is to make it as realistic and hard as possible. Get the mods that make your skills effect your accuracy but get iron sights, so that the lower gun skill you have the more shaky your gun is in your hands, hence making it harder to aim with the iron sights... go to
http://fallout3nexus.com/downloads/top/alltime.php and find what im talking about. It will turn fallout 3 into an actual good game to play and a real FPS/ fallout rpg.
call of duty realism (optional if your using other mods for difficulty)
real time settler (buggy)
IRON SIGHTS
ultimate perk pack and all others
real living through chemistry or something
fallout mod manager
marts mutant mod
killable children...
XFO complete or something
ack look up the list yourself but get these... think realistic.. makes it more fallout ... bah i think i shuld install fallout 3 now