I think FALLOUT 3 is one of the best out of the box rpgs Bethesda has created since TES 2 DAGGERFALL.
Agreed.
If you want to remark on the importance of mods to a Bethesda game, Fallout 3 is the last game you'd choose.
Morrowind is vastly improved by mods, that fix so many issues in the original game that it's crazy not to use them. It has vast potential for improvement and addition, and the potential has been tapped expansively for 7 years. You need mods for it. A modded Morrowind is
significantly better than an unmodded Morrowind. All modded up, it becomes godly, and still remains the ultimate Bethesda game for modding.
Oblivion is a similar deal, though less so. Less in the core game is broke as well. There are some good mods and they make the game better, but not as much as much as Morrowind. A modded Oblivion is
moderately better than an unmodded Oblivion.
Fallout 3? I love it out of the box. IMO few worthwhile mods have come out for it yet, but that's OK. It's not a broken game, so it doesn't have a pressing need for them.