I love Goldbrand personally.

i liked the Oghma Infinium

Azura's Star and Oghma Infinium.

The rest are fairly mediocre, but I'm forced to aquire them for one of the artifacts I do want.

Azura's Star and Spell Breaker. The rest are fairly mediocre.

Azura's Star used to be great in Morrowind, but the way soul capture works in Oblivion makes it redundant, it does nothing that you can't get a grand or black soul gem to do.

I find the Skeleton Key the most useful. I hate the lockpicking mini-game, so I have always used the Auto function for lockpicking anyway.
The Ring of Namira is my second choice, if you team it up with the Escutcheon of Chorrol you have a pretty good defence against melee fighters.

Azura's Star, hands down.
Saviour's Hide looked especially awesome on my female barbarian.



But Azura's star is reusable. And you cannot trap NPC souls with it.

That Azura's Star isn't running away with this one mystifies me!

wabbajack. i love suprises :-p

The SK is awesome.

The Skeleton Key.

I voted Azura's Star, but I think I would like Goldbrand if I ever did that quest at a decent enough level.

Azura's Star, Oghma Infinium, and Skeleton Key.

Why is Umbra listed as a Daedric Artifact? Wasn't it created by a witch or something? (I'm not that familiar with it's backstory)

The two I use most are the Skeleton key and Azura's Star. The former wins because mage characters eventually stop needing a weapon recharged and can do all they need by casting spells. At that point they don't need to capture souls any more. Lockpicking is a pain, and the spells available always seem to be at least one level behind the locks I encounter, so all my characters use the Skeleton key all the time.

Third is a tie between a lot of the others, depending on the character's style. Goldbrand is a great sword, if you like swords, but you can self-enchant a better one. The Ring of Khajiiti is useful, but you can get the same enchantments on other items. And so on... Everything else can be substituted but the two above.
I suppose there's no substitute for the Oghma Infinium, but I don't really value it's benefits at all.

Easily Skeletons Key. I use that more than anything, since most of my characters are stealth based.

Skull of corruption.

Azura's Star. It's the only one my mystic archer is even interested in.

Azura's Star and the Skeleton Key are my favorites.

Azura's Star and Spellbreaker are the most powerful while Sanguine Rose and Wabbajack are the most fun.

This. Azura's Star is absolutely essential for my Recon Snip and my Assassin. The Skeleton Key helps both tremendously as well.

Azura's Star, Skeleton Key and Namira's Ring :thumbsup:

YuYu Hakusho! Awesome!

On topic, I would have to say either Wabbajack or Spell Breaker.

Maybe Goldbrand on occasion.

Strange results on the Skeleton Key. I normaly zoom up Alteration to 75 and make custom open spells off of the "Open Very Easy Lock" spell that was used to train Alteration in the first place. Then just skip the lockpicking mini-game for the most part and just keep several hundred lockpicks onhand for when I do have no choise.

Skeleton Key. May be cheap, but I like it.

wabbajack, wabbajack, wabbajack!!!!!!

Wabbajack Wabbajack Wabbajack