Erik Pancakes said:

The Fellowship of the Ring - Extended Edition

The Two Towers - Extended Edition

The Return of the King - Theatrical Cut

ROTK is just too bloated in it's EE form, but the first two movies benefit greatly from their extra scenes.

I agree, though I could go either way with Fellowship as I think that while the added scenes are nice and very interesting in on themselves, they don't necessarily make the experience of the movie better (nor worse). TTT is another thing completely - the EE is a vastly superior movie experience. And ROTK EE is not only bloated but a lot of the added stuff is kind of stupid (falling skulls, spoiling the reveal of the fleet being taken over by the dead army, Mouth of Sauron and much much more) plus the effects on the added stuff are kind of cheap looking.