Holy crap, I love that game. I convinced a robot I was Thomas Jefferson in a quest to find the Declaration of Independence. Good times.
Hated it. I decided to do the main quest first, basically to see if there was any good quest finds (Power armor training) and as soon as the main quest is complete. GAME OVER. Nothing like Oblivion in the sense, the main quest is over, now do the rest. Just....ends... Obviously it's friggin' excellent if you don't do the last few missions... but yeah...Need to start ALL OVER AGAIN now....seeing as i relied on the auto saves...and it's saved right at the end of the game... Shame really...