Soooo, I went back to Megaton and paid Moira to decorate my home in the Vault theme. "Feeling homesick?" "Yup". I came from a Vault, after all. I was mighty impressed - it was quite vault like. Fawkes was with me. He gets to stay there and remember that he came from a vault as well so he should feel at home.
Anyway I sat down on the vault-seats, looked at me for a minute or so, saved the game and...GOODBYE Fallout 3!!
Did any of you deliberately end your explorations on the delivery of NV? Did you go down in a blaze of glory? Go psycho in Rivet City? Destroy yourself with 25 bottlecap mines? Or sell all your possession and donate all your bottlecaps to Confessor Cromwell?