Feel free to add what you would most like to see changed in a comment. Please avoid essay-length responses ^_~

Bug fixes and major issues aside, which improvements vastly improve gameplay to you?

Other: more dialogue options that have the information needed to support a quest marker free playthrough.

I voted for dog/follower NPCs to stop blocking the doorways. This tiny fix would improve my immersion 10 times over. Every time I struggle to move through a doorway, I'm taken out of the game.

Bad job on AI, Bethesda! :brokencomputer:

Take the shield charge perk and you won't need them to move hehe

Reasonably balanced combat/skills and decent PC controls and UI would be nice.

Insta-health potions are probably my biggest pet peeve, completely ruins alchemy for me.

Making Smithing not as overpowered. Seriously, smithing should max out at 100 in terms of added damage.

Bug fixes. First and Foremost. The things that should have been ironed out months ago.

Other: Explanations for some inconsistencies.
One example - My Khajiit can enter any city, but the other Khajiit can't.

I chose other.

Feel free to cut down on repetitive fetch quests and focus on quality writing. One golden claw quest is enough, please don't make me zoom in at another 8 claws for the rest of the dungeons, or flip animal stones to unlock gates. That got old fast by the 3rd time I had to do it.

Optimization overall and Bug fixing.. I don't want to add more content till the current is fixed.

"not broken" you say? Then tell me why I get constant CTD's in Vanilla then and need to resort to mods to create less chance of em.

Spellmaking.

That list is so weak I almost don't even believe that you've played Skyrim.

quest fixes please. I now can't finish a quest for Devlin and get any more. There's no dialog available I think because I have 2 special jobs I can close, and it confuses the quest logic. Arrg.

make speech better

Definitely bug fixing and performance issues.

Some of these ideas are good though, but not essential right now.

More written dialogue/ dialogue choices.

Enemy balancing. Why was that vampire I found fighting a Knight of Stendarr hitting me about three times harder than the dragons of my level? (on my level 25 paladin). Why do random bandits sometimes hit harder than dragons at lower levels?

Your list is weak. No wonder most role play something utterly boring and pedantic.

Have an alteration mage shop where you can change your appearance

Have an Elder Scroll that can reset your perks

More diversity among gear, characters and towns

Better more entertaining books

A house with multiple chest storage allowing you to sort them the way you want

Random generated NPC's replace dead ones including followers at some fraction or random for hire

Bandits with better gear so I don't find myself enchanting daggers often

More creatures, Dragons are pretty boring to fight but would be interesting to ride one like a horse anywhere you want

Quest-breaking bugs should be dealt with first. The rest is peanuts