Hmm i wonder that you alll can sneak up your enemys and they don't detect you. Bandits even find me if i am invisible. Only if i use a "You can sneak on highest level now" Spell they MIGHT not find me. So i think the AI in my game is better (gods) then in your game

Sneaking in dungeons may be broken, but sneaking outdoors at night is fine. It is possible for assassins to spot me despite being far away. They are definitely not as easy to sneak up on.

I was really hoping for a few quests like that: You must infiltrate a heavily guarded place, and kill guards patrolling the area (or sneak around them) as you slowly advance to your main target.

And as a few others have stated, the Hitman games have decent AI; they actually react to finding dead bodies and stay on alert for quite some time (sometimes for the rest of the mission). Of course those games are dated, and the AI can still be easily manipulated, but I don't see why Bethesda wouldn't be able to improve AI in that area: to make them be alerted for several minutes after hearing a noise, getting hurt by the player, or finding a dead body.

You don't really sneak in AC, you just avoid.

Far Cry 2 Stealth!

Once you get what it's about it's basically the most enjoyable stealth play I have ever had. Once the NPCs agro, they simply won't de-aggro until reset/respawn. It's all about killing as many as you can until the alarm sounds. After that it's good old fashioned gunplay. But if you play your cards right, you either manage a full ghosting of an enemy camp, or at least when your cover is blown, the enemy will be weakened by a few men... hopefully the snipers in the towers and outer perimeter patrols.

The Stealth play in TES doesn't really bother me much, the way the AI reacts to it does alot though. Taking hints from Far Cry 2, i'd say keep the current system, but make the AI react more like the ones above, if alarmed, they bring the entire camp on full alert for 2 in game hours or so and perform patrol sweeps around the dunegon/camp/whatever.

If you couple that with a "save only on resting" philosophy to prevent going for the load game after alarm and just do you best and live with whatever you pulled off is quite enjoyable.

There is at least one quest in Skyrim where you do. I can't remember it now but it's basically "quietly infiltrate a fort and kill everyone without being noticed".

My warhammer weilding Orc muffed it in the first kill! Unofrtunately there were no repurcussions for this, I just went on in, warhammer ablazin' and wiped them all out.

Well, the actual purpose of the game is to be an assassin - blending in with your surroundings, and remain undetected from your targets.... or did I really misunderstand the game?

I was sneaking in Skyrim just last night, and an NPC kept turning and turning and turning to face me. I don't think sneaking is overpowered.

There was sneaking in Morrowind.... and yes the enemy AI could be better.