I'm hoping new enemies, weapons, an hopefully a new area. What do you guy want?

Well all of those have been confirmed I believe. Assuming Solstheim is the new area (which I'm almost certain it is). All I hope is that the add-on does not cripple the game or anything or introduce a multitude of new bugs into Skyrim.

Honestly, a long and meaningful questline.

I think we are getting new weapons and armor, but not sure if there is a new area outside of Skyrim other than going back into Oblivion (The Soul Cairn)

Isn't the game set on Solstheim ?

I love wishful thinking

No where have I seen that, unless I missed something. Where did you see that?

I would like to see new conjuration spells, I feel that the current selection of summons is lacking. I would also like to see a larger selection of unique items/spells than what we currently have.

Some more spells would be nice.

I'm hoping for a great reason to go back to the world of skyrim.

There was a purple flaming looking horse mount in the trailer, I am guessing that is a new Conjuration spell. Just a guess.

What makes you think Solstheim is where we will go?
I am hoping we get a new area to explore one we have yet to visit thay would be perfect to just explore and plunder. That is part of what I want to answer the OPs question, I want this landmass island or whatever to be huge an expansion that would great add playability and replay to this game.

I also want added depth, the new weapon types are a plus for depth and great for options sake which that is a thing TES needs and requires options.
I want meaningful deep and ling quest lines that has an impact on the world where certain things change if you do something.
I want bigger cities added to the new and old content.
I want spell creation and the old spell catalog dating back at least until Morrowind because as magic is now its gutted and bare bones compared to what we once had.
I want new NPCs with great dialogue.
I would like this expansion to include the world in the base game a little bit as well.

Some dragon shouts or if anything some nice armor.

Werebears

I kind of want spell creation back as well. Such a fun feature in Morrowind and Oblivion.

Nothing has been said about Solstheim island at all not to my knowledge anyways.

I think there was much speculation that it would be set on Solstheim considering some of the creatures seen in the trailer resembled creatures found only on the island of Solstheim. Don't think it's confirmed yet, maybe it isn't even the case but it seemed like it was almost certain it was set there.

I would like that too. My wish for magic is either give us more spells and allow spell-combinations, or just give us spell-making back.

I just want a Candlelight spell that lasts longer than 60 seconds.. Give us one that lasts for 500 seconds.

Why not spell combinations with spell creation the options would be staggering and it could be tied into spell creation and certain effects could be locked off by using another effect or so on of they are not compatible.

I would rather have spell creation and that back catalog I mentioned if I had to choose tho.

We could set a time and the amount if light it puts out with spell creation.

More unique items unaffected by smithing with unique enchants. Like ebony blade but stronger.

I wouldn't mind that but then again a lot of people would complain about balance issues. Wasn't that the reason spell-making was taken out?

Generic NPCs for cities.

In all honesty, I would be happier if they just released city add-ons for places like Winterhold, Whiterun, and Riften. though I do like the fact they are adding more via patches.

More Perks. More Levels. More Variety. More Armor and Weapon variety.

It was taken out because supposedly it was to spreadsheety which is complete rubbish it gave depth and customizability to a system and brought it depth.

Lol at those arguments about balance, the only people that argues that point create exceptionally powerful spells and use them and then complain because they created a spell so powerful. If you wish create powerful spells if it suits your character on other characters impose self limitations its fun to do that roleplaying wise.