Isn't Jyggalag his own Prince now?

Yes but I included him with Sheogorath.

Favorite: Jygggalag, because he was a master or order and I just have a soft spot for him. And his knights looked sweet!
Most Hated: Molag Bal, because he is a rapist twit with an annoying voice and a useless artifact.
Best relic: Ogma Infinium, because the RP fact of having a book of infinite knowlage is great
Worst Relic: Saviours Hide, because in Skyrim, it shows way too much upper chest. It looks like someone tried to squeeze a watermellon through the neck.
DLC: Hermaus Mora. Just because.

If anyone read "The doors of Oblivion" Azura should be a definite choice for another DLC like Shivering Isles. The way it is described sounds awesome at least.

Favorite: Meridia. When it comes down to it, all the princes are selfish. Azura wants you to svck up to her, Mehrunes Dagon wants you to destroy things, and Malacath wants his orcs and ogres to himself. Meridia wants you to not defile the dead. To help you achieve that, she gives you the perfect weapon for destroying those undeads and sends you on an everlasting journey to enact her wil. She is the light, lady of the colored rooms, she's awesome. She's seen as good because she's against something morally dispicable, and I dig that sort of neutrality.

Least Favorite: Molag Bal. He's the Daedric Prince of [censored]. I feel horrible just typing that out. He's disgusting and I'm tempted to expand the Dawnguard story to destroying him utterly.

Best Artifact: Infinium. It's all the knowledge. You can't beat that. Mora is a great prince, he's dedicated himself to the noble practice of collecting forbidden knowledge. Without him, we'd probably have destroyed Tamriel by now.

Worst Artifact: Volendruug. I'm more of a holy hammer guy than a demonic hammer guy. I've never had a desire to use his hammer, though I did use it a bit in Oblivion to level my blunt skill. It's remarkably unremarkable, which is not something I appreciate from a daedric artifact.

Expansion: Gotta be Azura. Her realm sounds amazing, and it's currently sealed off to anyone in Mundus. I say that if you repair her star, she should invite you in to be her champion. If you turn it black, she should applaud the courage it took to defy her, and she would offer you a deal: if you come into her realm and do her bidding, then she won't torture you forever.

@StarDebris

KILL MOLAG BAL. DO IT. Molag Bal Commands you.

Haven't read it please explain.

If so many people think Molag Bal is their least favorite Daedric PRince will they not buy ESO as it stars him? Just a thought,.

Azura would make an excellent expansion.

My favorites are Peryite and Meridia and my least favorite is Azura.
Azura is such a petty, scheming powerhungry vainglorious one, she even has half the fans fooled she's 'good', let alone the people of Tamriel.
Yet she caused horrible things to happen in the name of petty revenge, spite out of being disobeyed.
At least Molag Bal and Mehrunes Dagon are up-front about them not being very pleasant individuals.
What you see is what you get.
With Azura, pretending to be something other than she is is a fundamental aspect, a way she tricks people into her service and like Clavicus Vile it is this scheming which makes her most like a demon as we know them from the stories on Earth.

Peryite and Meridia again are very up-front and direct.
The Cleansing Fire and the Daughter of Light.

Had not realized Azura was so evil.

Well, she told the Chimer not to use the Heart of Lorkhan.
When she was disobeyed by three Chimer individuals she then proceeded to curse an entire race.
Not being content with having lost her place in the Chimer/ Dunmer pantheon she then went on to send prophetic dreams to dozens of individuals who tried to become her champion, Nerevar Reborn, only to for them to fail and die. So she goes on to the next victim.
Then finally a true Nerevarine disconnects the Heart from the mortal plane, kills at least a third of the Tribunal, and dissapears.

The consequences of this was that the moon orbiting over Vivec city became unstable. Azura went on to warn only her faithful of the danger, leaving everyone else to die.

In the Oblivion game Azura had some nice toys (followers) that became vampires while doing her bidding.
She then didnt like the toys anymore and sealed them away. Didnt try for a cure from other Princes, waited till a random svcker (the CoC) to come along so she could command him to destroy these toys she had no further use for.

And thats really it about Azura. She sees mortals as toys, and when they anger her or bore her, she destroys them.

Also, this is Daggerfall's Azura dialogue:

Quest Offer

Azura speaks to the player:
You dare summon forth Azura of the Crimson Gate, pleading for power? I don't know if you are worthy of such favor. In fact, I doubt it very much. I suppose that if I demanded that you murder a priest who has been saying very, very rude things about me, you would refuse even that small, simple request. Would you do that for me?
Quest Acceptance

Azura goes on:
You would! Oh jolly good. Well, this perfectly awful priest is also a Healer, if that means anything. Isn't that just typical? As usual with these self-rightous [sic] types, (priest's name) is secluded in (dungeon), cleansing or some such ridiculous thing. Anyway, why don't you hop on over there and stick a sword in (him) or something. And then scurry over to (town) and see my dear darling (worshipper's name) who will give you my Star. That's enough power for anyone. I think (time limit) days is time enough for this, don't you? Oh, good. Hurry along then, (player's first name). And don't be a stranger. Say hi to (worshipper's name) for me. Okay, 'bye.
Quest Decline

Azura yells:
No! You're supposed to say yes! You're supposed to say: Yes, beautiful Azura, I would gladly murder at the snap of your ivory fingers. Boor! Bigot! Barbarian! Now, I must go before I forget that I am a lady and say something that I'll regret.

That shows her true colours nicely, I thought.

Seems normal to me.

Notes:

1) There should be a distinction between Sheogorath and Jyggalag. In the past one was the alter ego of the other one,but now there are 2 entirely different persons. (Modern Sheogorath is player's character from Oblivion)
2) Why no Umbra there ?
3) Each one deserves his own expansion!

If you know many women that tend to go: "o! You're supposed to say yes! You're supposed to say: Yes, beautiful (womans name) I would gladly murder at the snap of your ivory fingers. Boor! Bigot! Barbarian! Now, I must go before I forget that I am a lady and say something that I'll regret." I suggest emigration

Best: Jyggalag. Order. The Prince of Ultimate Order,cool voice,powerful,mistreated,and generous.

Worst: Molag Bal. He raqes women and made his raqes a religion. He created vampires. He has the most evil and cruel daedric quest in Skyrim.

Best artifact: Umbra. After that,the Skeleton Key.

Least favorite artifact: Ebony Blade. While the only Katana I discovered,its enchantment is very usual in Katanas. At least in Oblivion.

Best: Nocturnal. For obvious reasons... er wait, I'm not supposed to be obvious.

Worst: Malacath. Ugh.

Best artifact: My cowl. Perfect for hiding in plain sight!

Worst artifact: Dawnbreaker. Such a nuisance.

Expansion: Mephala. Spread of shadows and darkness, and I don't even have to reveal myself.

What do you mean by worst or best? Like coolest or lamest? Strongest or weakest? Nicest, and meanest?

Your favorite.

Yaayyyy lord sheogorath is winning, cheese for everyone and why the duck wasn't he listed for an expansion I'm pretty sure re shivering isles has changed over a 100 years ducking later

Yes.

My favorite prince was between Hermaeus Mora and Azura.

My least favorite is Namira.

Best Daedric artifact Azura's Star and Mace of Molag Bal.

Worst Daedric artifact Namira's Ring.

Who deserves their own expansion? Azura

Also fyi Lorkhan is not a Daedric Prince.

Lorkhan being Daedra is just Mankar Camoran propaganda

I think this is what makes Azura the best Deadric prince, although my personal favourite is Hermaous Mora.
I find his grotesque appearance... sixy, I'm kidding, But he is the only Deadric prince that doesn't try to look like anything specific.
He also gives the Oghma Infinium the Artifact most useful over all.

Mehrunes Dagon is my least favourite, he is constantly screwing stuff up all the time. He is the primary antagonist of 2 games. He is the one behind Jagar Tharn in the first game.
I'm a little surprised the end battle of Skyrim didn't have the player fighting Dagon mounted on Alduin, but I digress.
I'm not a big fan of Boethiah either.

Being a fan of Horror I would love to see more of Vaermina. I'm not sure how she would be implemented.

Favorites: Peryite, Sanguine, Hircine, and Malacath.

Least Favorites: Mehrunes Dagon and Clavicus Vile.

Best Artifacts: Gray Cowl of Nocturnal and the Savior's Hide

Worst artifact: Volendrung

Most deserving of an expansion: Vaermina