There is only one addition to an EE that I don't like. The scene in ROTK when the millions of sculls come dumping out in the Paths of the Dead. Unbearably stupid, and easily the worst moment in the whole trilogy. Shockingly bad. With that one exception, I think all the additions make the films better, at least for fans of the book. I mean, the Theatrical Edition of ROTK misses two of the greatest moments from the books, namely The Mouth of Sauron and The Houses of Healing. I can't tell you how thrilled I was that they were included in the EE. Despite the atrocious scull scene, the EE of ROTK is my favorite of the trilogy.
The Two Towers Theatrical Edition is unwatchable for me. The treatment of Faramir made me physically sick the first time I saw it. I'm not joking or exaggerating (I didn't throw up or anything, but I did have a pit in my stomach). The additional footage in the EE made the changes to his character much easier to stomach. I quite like TTT EE now, including the invented scenes in Osgiliath.
Of the three, the only TE that is nearly as good as the EE is Fellowship. I'll never forget the awe I felt seeing that in the theater for the first time.
