Not exactly sure what is the point of jumping and falling everywhere to up your acrobatics. Ok on the rest.

1. More armour variations for ranger/thief/assassins
2. Shortswords
3. More options for followers (let them ride, stealth kill, eat and drink with you, more voice options, us the damn weapons you give them!)
4. Show all your weapons like the "Armed to the teeth" mod. (and draw dual wield weapons, not pull the left weapon out of thin air)
5. More enemy varitiations

This would be my 6th.

Slow character progression by NOT getting one of the 1st 3 standing stones

Four of them are spellmaking and the fifth is bringing back all those spell effects that were cut.

In no particular order:

Khajiit marriage options

Major Conjuration additions
(Atronachs and Blue Thralls are pathetic)

Acrobatics/Movement speed perks
(My Khajiit doesn't feel like one)

More unique armor/weapon types
(Dragon Weapons/Crossbows/Spears are a good start)

Better pets/Improved pet system
(Wolves, Spiders, creatures)

Agreed with all these.
Though maybe that last part.
I like Belethor-the-Enclave-Officer too much to even kill his assistant.

Actually I'll draft my own list:

1. Deeper dialog and more dialogue options.
2. Racial recognition
3. Damage Treshold system
4. Option to assist the Thalmor if playing an Altmer, Bosmer or Khajiit
5. More NPCs, just generic folks who wander the towns with daily routines.

So... you basically want Morrowind? Anyways:

5. Bringing back old spell effects that could've worked fine in Skyrim. (Silence, Water Walk, Cure Poison, Cure Disease, Dispel, Open Lock, etc.)
4. More weapons (specifically, short swords, spears, crossbows, one-handed hammers [so i can make Thor ])
3. Better bards (so my ears don't bleed listening to the Bard in Dawnstar singing Ragnar the Red)
2. More options for questlines (such as a way so that you aren't compelled to follow the main storyline, among others.)
1. Marriage options for underrepresented races (particularly Khajiit and Bosmer, because there are like 5 Orcs you can marry for ****'s sake!)

1. More skills and attributes
2. More dialogue options for the player
3. Longer and more original quests for guilds
4. Unique loot not scaled
5. More npc recognition of our deeds and less one liner spam

1. The whole journal, every single damned entry, to be rewritten, fleshed out, made into a worthwhile read, made more than a 'to do' list and directions to replace quest markers added to every entry.

2. DLC to include branching quest lines, with consequences for your decisions, and recognition of your actions from appropriate npcs.

3. Speechcraft and lockpicking to be worth investing in, via more skill checks for speech, and both a change in the lock mini game to seriously ramp the difficulty, and the addition of a skill and perk based auto percentage.

4. A severe culling of the sheer amount of essential npcs, some of whom, camp commanders for example, have an essential status that is totally counter-intuitive.

5. More, and I mean loads more, spell tomes, with enough effects that playing a pure mage is no longer hampered by lack of options.

1. More spells
2. balance in lvling skills (Illusion is easy to lvl up, block is hard to lvl up, onehanded is easy, smithing is nerfed too much)
3. Spears
4. More variations of weaponry and armor sets (more low lvl-looking armor/more realistic armor, like fur and iron armor and weapons)
5. More enemies and unique bossbattles (daedra, werewolves)

• Stats
  
• Weapons and spells
  
• Fleshed personalities for npc's and companions
  
• UI and quest journal (function over design)
  
• Beast races beast body

1. More weapons
2. More Armor
3. Raspy Dunmer voices.
4. More spells.
5. Colovian fur helm.

1.- More dialogues and options with effects and consequences and with this, don't need the quest markers.
2.- Better journal (with point 1, this isnt mostly needed)

thats all.. and skyrim would be almost perfect.

1. more non enchanted robes
2.More conjuration spells
3.A build-able base.
4.Some expensive items to spend my gold on
5.Divayth Fyr to return.

1. A Pipboy to check the Rad-level of these Nirnroots.
2. A Option to get rid of stuck quest-items, something like a "are you sure that you want to remove this" popup or something.
3. A better interface
4. toggle killcam
5. All armors should be renamed to "dwarven-armor", so the ancient knowledge perk makes sense (trollolol)

5. Spears
4. mounted combat
3. crossbows
2. spell creation
1.lycanthropy tree

I could add more but these are my top 5.

1. Better disposition system
2. More choices&consequences
3. Spellmaking+more spell effects
4. Toggle for killcams
5. Arena

1. Acrobatics
2. Rich dialogue
3. Mounted combat
4. Seamless world (no loading)
5. Spears, thrown, hand to hand, levitation

more:

1-spells
2-quests
3-cloths
4-weapons
5-armor

and you know what I'm gonna get them XD

1) Attributes

2) Branching dialogue options and better voice acting

3) All the old spells that were cut from the game

4) More skills

5) More emphasis on skills than perks

- Spears (throwable)
- big monsters (lol@dragons)
- spell making
- house creator for own house where you want it
- spouses that actually feel like family

Oh forgot to add!

Every NPC to be killable!! I hate going into a small village, murdering a person, getting a bounty so thinking "ok easy fix just murder everyone here so I have no more bounty!" Only to find out that I can't murder like 3 NPCs in the village thus I still have the bounty!

Personally, I think perks should have been used for specialization within the skills.