Like rebuilding Helgen and Winterhold.

The best was the patch just before dawnguard, which let millions of Xbox 360 users actually even ZONE into some areas again (without locking up their systems.)

It is no wonder that Bethesda dropped that "fix", just before Dawnguard; Not being able to zone into many areas, would probably have caused a lot of people not to spend the $$$ for an add on they could not use.

That was the best "content" for me, simply the ability to play at all.

Prior to that, on the xbox 360, actually spending time playing the game on one character REAMED you. This was because you hit the wall once your savegame file was a minimum of 20 meg, where the lock ups REALLY started. Part of this was due to the "insane nirnroot glow stacking."

Its really horrible, in 2011-2013, that you have to worry about a major game from a major company for a major console due to something called "insane nirnroot glow stacking."

I remember that even BEFORE the lock ups in many places, such as suddenly not being able to get into my main base at Markarth AT ALL, locking up when approaching anywhere near a body of water outside where some nirnroot "glow" had gone totally bonkers.

You might not say that is really "content", but it removed a bunch of "content" (in the case of stacking glow and other problems) which were making the game totally unplayable. Its just lame that they waited until just before the release of a dlc, to fix things that had been going on for quite some time for a lot of users. Somewhere in there they also added more "cleanup" code, making it so you did not feel that you had to tour the countryside stuffing all manner of crud back into the bodies of dead NPCS; You can say one thing though, that gave us a lot more to do in the game.

Now with dawnguard, dragonborn and finally hearthfire I'm at a minimum savegame file of 23 meg. I'm still not experiencing the constant lockups I was back then.

In all seriousness, its hard to chose but.. Blade of Woe, Delvin Mallory, Neloth, Teldryn Sero, Raven Rock, Killcams, Redwater Den (even though it was a one time thing).

The Spell Flaming Familiar, I love using this in groups of opponents. As Anska is fond of saying "Sometimes it is fun to watch them burn"

The Imperial legion.

The whole of Dragonborn with all its quests, people and items, really like that DLC!

umm umm there's lots of other stuff, i just can't think of any right now.

As a bundle, Dragonborn. As a stand alone quest, tie between Unseen Visions and Alduin's Bane. What can I say, I like the Scrolls.

Too hard to say, but I was really impressed with the Forgotten Vale and still love returning there to see if I missed anything, although a lot of things never respawned.