I LOVE the Ebony Blade in both games. In Oblivion it was one of my most powerful weapons alongside Goldbrand and Umbra. And in Skyrim, it was so satisfying killing the worst follower ever (Sven) then dropping his head in front of Camilla as the Blade grew in power because of my treachery. So I wonder which artifact you guys personally adore?

I like Spell breaker. What's great about it, (with exception of Daggerfall) is that it has more or less kept the same shape since Morrowind.

the Daedric Crescent, closely followed by the Spear of Bitter Mercy


EDIT: ohh from Oblivion and Skyrim? Azuras Star i guess

The only one I've ever used is the Ring of Namira. So, I guess, "Ring of Namira" would have to be my answer.