I think Telvanni Robes win hands down.

I don't know about these robes but I love the red hooded monk robes.

Thalmor robes

Hooded Brown robes or hooded green robes.

Can't say I find any of them very appealing. The lack of the Black Hand robes is disappointing. Although lore-wise, it wouldn't be possible to have it back after the crumble of the Dark Brotherhood in Cyrodiil; still, did I find the style of the robes in Oblivion to be far better.

I guess my favorite robes are the full black ones that include the hood.

This. Just too bad that they are, you know, Thalmor robes.

The Psijic Order robes and Sheogorath's are very cool !

Well, the court wizard and enemy mage robes all looked like they were stitched together by hobos.

The college robes are definitely not robes.

The Archmage wears a poncho.

Therefore, the Telvanni win.

We have a winner here

Those are #2 for me

Robes are for puny boys, real men wear armour!

I'd say the Thalmor robes along with the boots and gloves look nice

Tell that to the Spartans !

I like the Greybeard robes.

Thalmor Justicar robes, to be sure. Nothing like putting on the reich.

Except Spartans wore armor. The idea that they went around near-naked in battle is an exaggeration of their bravery and a result of Renaissance romanticism.

I completely forgot about those. There really good looking In my opinion.

Can't wear them without CC, so those don't count :\

Those are my favorite too, but they're not normally wearable.