Elmofongo: Well off to Fallout 2, is it better than 1, how different is it in terms of gameplay and content?
This is my personal opinion only (naturally), but Fallout 1 will feel like Fallout-Lite once you boot up Fallout 2 and have played it for a while. It has more of everything plus, it's my personal favorite game of all-time. Gameplay is pretty identical, but there are a lot more quests and towns to explore.
This is coming from memory, but did you have the Bloody Mess trait when you played Fallout 1? I think if you have that trait, the character will shoot the overseer in the end. Otherwise, he will just walk away and abandon the vault like he is asked. Also (again from memory); whether or not you purchased water from the Water Merchant (to extend the time you have to find the Water Chip), will affect the ending (the Mutants spot the caravan).
Also, don't forget to try Fallout Tactics! It's not as story-oriented, focusing more on combat, but it's still an awesome game.