---------------------------
Spears
Crossbows
Unarmored
Enchanting and Spellcrafting. I should be able to do this myself, not pay to have the Mages Guild do it.
Craftable Armor. I think Armorer skill should allow me to make my own armor with ore and a forge.
More varieties of Armor. I liked how much there was in Morrowind. Nordic Mail, Bear, Wolf, etc. I'd like more of these to be brought back.
Separation of Long Blade and Short Blade. They're not the same.
Separation of Axe and Blunt Weapon. Axes are not blunt.
Were-creatures: Werewolf, Wereboar, Werebear, etc.
More Artifacts. I found Oblivion to be greatly lacking in this aspect, where as Morrowind, I found much joy in collecting rare and unique items.
Dual-Wielding Weapons
Tattoos
Facial Hair. This is an absolute must. I hated how on Oblivion I couldn't have a beard.
A more streamline Character Customization system. I had fun with the Oblivion one, but I'd rather not spend 4 hours customizing my character.
A Wider variety of Hair-styles, reflecting the character's racial backgrounds. If I'm a Nord, I want a more Viking-esque array of hairstyles, like the ones from Morrowind.
Obtainable Scars. I liked in the game Fable how if you got scars from battle, and would like to see a similar system in the next Elder Scrolls game.
Sweet Spots in combat. I think if I slash someone in the throat, it should do more damage than if I slash them in the shoulder.
Decapatation, and other forms of disembowelment. I want to chop people into pieces.
Partial Nudity. This was in Daggerfall, and I see no problem with t. In the old days of Table-Top Dungeons and Dragons, the handbooks contained artwork featuring topless females, and in a society where there's supposed to be equality among genders, why should women not be able to show their chests when men can?
The Ability to travel to every Province. In Oblivion, you constantly heard of stories in other provinces such as Sumerset and Morrowind, yet you couldn't witness it for yourself. I'd really like to be able to go to places like Skyrim and Valenwood as well.
Deeper insight into the Dwemer, and possibly the ability to find out where they went. In the Elder Scrolls. the Dwemer were always my favorite lore subject, yet I'm still left hanging as to what happened with the Disappearance of the Dwarves.
A look at Akavir. This is another great lore topic that I'm sure we'd all greatly appreciate.
Marriage. This is something I always wanted to see. I think since we can purchase a house, we should have the ability to meet and marry various NPC characters.
Children NPCs. This is a rather trivial, yet mood-setting addition I'd like to see. I always thought it was weird walking around the Imperial City, or one of the other towns and not seeing any children running around or anything.
Dragons. I see alchemical ingredients like "Dragon's Tongue" and I think: "Where are the Dragons?"
Armor Display Cases for out homes. Even if I'm not wearing it, or have enough weight capacity to carry it in my inventory, I'd like to put my collected armor sets on display in my home.
Pack Animals/Wagons. I often become over-encumbered in my travels for treasure, and really wish there was a way to carry more loot. A pack mule, or the ability to have my horse mount pull a cart around would be nice.
---------------------------
Feel free to commentate on my suggestions, or add on to what could make the next Elder Scrolls game even better than all previous games.