Fallout 1 , 2 , tactics , fallout 3 and NV i loved them all and still do.
Come on fallout 3 wasn't that bad , it because dialogues weren't the best quality doesn't mean that suddenly the whole the game is shit.
The whole execution was shit.
And dialogue, was what freaking MADE fallout 1 and 2. the dialogue, choices and consequences.
If fallout 1 and 2 didn't give you good idea of consequences (because honestly, it's kinda hard, you can just save and shit)
Play mount and blade warband, on realistic mode, and you get the most balanced yet harsh and simple choice and consequence system ever.
Maybe that is not best comparison, because they are pretty different games in general. But still, I think the thing that made fallout 1 and 2 was three main things.
1. The wacky yet serious/dark tone.
2. Amazing choice and consequence/dialogue.
3. The story was awesome and setting.
Everything else imo was just icing on the cake.
Fallout 3, had none of this. the concept of the story was awesome, yes, but the execution was just a plain turd.