Right now I'm dual wielding an Ebony Dagger and the Blade of Woe. I don't think I'm high enough level to find Daedric Daggers randomly (level 12).

What's your favorite dagger? Enchanted or not.

Superior Glass Dagger with Soultrap + Azura Star Black!

Blade of Woe, simply because it has right now 64 damage and I haven't even picked the rank 5 of armsman yet. (got 83 one-handed, but need another level before I can pick it).

But oh my how cool the daedric dagger looks! (even though it does quite a lot less damage, because I used a random potion to improve blade of woe 30% more, might be BoW would be better either way)