Best Oblivion/Fallout 3 mods?

[AMMO Kid]

What do you think would be the best Fallout 3 or Oblivion mods to get?

 

[PurpleLeafRave]

Get a dragon on Oblivion.

I could probably spend a whole day on just that mod. I'm easily amused ok?

 

[mad825]

........

you need to be more refined in the question than that, I would argue that most graphical modifications (graphical enhancements) are the best but the best one would depend on how many bugs there are.