Didn't like Fallout 3 so much. Just kind of a soulless game, too similar to a lot of other stuff though.
Fallout 1 and 2 though...probably my favourite games. Like someone said, the fact you can complete Fallout 2 without killing anyone, or you can kill every single person in the whole game. That's awesome.
Don't know if you guys know, but some russian guy's been working on a mod that makes fallout 2 online like an mmorpg. It's mostly done, there was a big open beta awhile ago and now it's just being fine turned before the final beta and release in the summer. Somehow I managed to get on the dev team because they all speak terrible english (You see a packet cigarettes. It is Marlboro, an absolutely usual brand.)