I have Fallout 1 and 2 and have still never played them.

They're installed, just not played. :unsure:
Same as me. I have Fallout 1 installed but haven't played yet. I am using windows 7, and had to tweak it to get it to run correctly, otherwise I get weird colours. I forgot what I did so haven't played it yet.
Now are you talking about Fallout 3 or Fallout 1? If talking about Fallout 3, post in the F3 forum, you will get better replies. If you liked Oblivion, you should like Fallout 3, if that is what you are talking about.
For me, it's like Oblivion with Guns. I find the stories great, the action awsome, and the quests better than in Oblivion. It takes a bit to get use to, because where it differes is from the traits system and
character creation is different from Oblivion.
I say Yes to Fallout 3, to New Vegas, but haven't played any of the other Fallout games Yet.