I've always been disappointed by FO3's endings since they never showed the outcome of your actions. Instead they just talked about how good or bad you were.
So I've decided to make up my own endings and it'd be nice to see your ideas (based on your choices for your own characters). Without any ado:

*Throaty Ron Pearlman voice*

And so the Lone Wanderer left Vault 101 in search of his father...

Due to your defusal of the Megaton bomb and the death of Mr. Burke the town continued to thrive as a settlement in relative peace. However the Children of Atom cult died along Burke's mission to blow up the bomb. Confessor Cromwell and his apostles' faith was shattered and as a result most of them committed mass suicide...the graves outside of Megaton are numerous. The former cultists that didn't kill themselves leave Megaton and wander the Wastes in search of a meaning to their lives.

Aiding Moira Brown with the writing of the Wasteland Survival Guide proves to be a productive feat. The guide is mass produced and its tips are spread all across the Wasteland. It acts a guidebook to up and coming scavengers and trading caravans. Moira becomes famous but doesn't forget to mention how your involvement is what fully completed the guide.

Your acting as a diplomat between the small settlement between Arefu and the Family proves to be fruitful for both parties. Arefu expands from a small settlement to a large town and resting stop for caravans on their way to and from Canterbury Commons. The Family continues to thrive on the blood donated by Arefu's residents.

The slaughter at Paradise Falls proves to be a major if not fatal blow to the slavery system of the Capital Wasteland. The death of Eulogy Jones and his slaver lieutenants leaves the slavers leaderless and the once thriving slaver town is completely abandoned, its only visitors are occasional scavengers or wild animals. Slavery still exists but on a much smaller scale with slavers occasionally enslaving lone scavengers and chem junkies. Former slavers disappear into either the BoS or out into the Wasteland.

With the death of their leader Commander Jabsco, your assault on Fort Bannister, and its failures in taking the Capitol Building from the Super Mutants and subsequently the BoS, Talon Company was launched into several years of disarray and chaos that was marked by multiple coup d'etats of leadership and fighting amongst the ranks. The mercenary company disbands and Fort Bannister is blown up with high explosives as a away to deter scavengers. The symbol they once bore proudly on their black armor is scratched out and they are never heard from again.

Your discovery of Vault 87 and its FEV labs prompts the BoS to send extermination teams into the Vault in search of the vats used to make Super Mutants. These vats are eventually discovered after months of searching and the Brotherhood proceeds to blow up most of the vault. Within several decades the once numerous and fearsome Super Mutants are either dead or slowly dying out. Most of D.C. is reoccupied by wastelanders and BoS outposts spring up all around the city.

With your rescuing of Big Town's only doctor and training its residents in the use of firearms, the settlement manages to flourish especially due to the destruction of the Super Mutants and the slavery system being all but dead. The settlement becomes a trading town for caravans coming in from the South on their way to Megaton.

Now I know that these aren't the best written and I'll be revising them when I can but it'd be nice to see your ideas!

Decent ideas for endings.

I think the Republic of Dave should be abandon after Dave's son takes over and rules poorly, the BoS slowly turns itself into a country, annexing every settlement in the Capitol Wasteland within a few years, the Outcasts fight them in a losing war for years until a major attack by Lyons breaks the Outcasts down to nothing but remnants, and Allstair Tenpenny uses his mercenaries to try and fight off Lyons until he is defeated and his tower is taken over.

A nice story , but to fluffy for me. Mines a bit shorter and harsher.
But here goes.

After wandering the wastes through many many adventures. The lone wanderer comes accross an old nuclear missel silo.
And due to haveing Science,repair and explosives skills of 101. By way of completeing the Re-re visted vault 101 mission and getting a perfect score on the G.O.A.T the second time.
They recieved the long coveted(and very secret) vault 101 perk.

This allowed the Lone wanderer to arm,rewire,and reprogram the Nuclear wessels trajectories , raining death and destruction down upon the DC wastelands and all surrounding area's.

No one survived .... Oh wait , youve got to be kidding me ... Moria Brown is still there ...

this is a cool idea. the ending is pretty boring and if the things you did in the game had effect on the ending like in the Silent Hill games i think it would make replaying the game a must several times over

Civilization its just such a funny song

The Enclave kill the brotherhood, and form a nation that is large enough to destroy the NCR and Legion, and once again reclaims America

I wish