Criteria: Level of Difficulty Added and Fluidity of Added Elements During Gameplay.

Killing Traps by rolloLG

Notice how every trap in Skyrim causes about as much pain as stepping on a tack? Well, rolloLG did as well and fixed that for us. Now when large spikes come shooting out of the walls and impale your body, you might actually die........go figure.

Traps Make Noise by kryptopyr

Now when you carelessly trip over a wire that sends boulders crushing down from the ceiling, the once lazy guards nearby will now come and check out the noise. No more ignored racket for you--makes being a thief more challenging (also known as "fun") as well.

Subliminal Traps by Mr. Dave

It was nice how the enemy marked every pressure plate with a giant "X" for their subjects to discover, as well as try to not conceal any trip wires. With this mod installed, you'll have to pay close attention to your surroundings since it does away with all the milk-drinking "hey look at me" warnings.  (Seriously Bethesda, come on.....)

Deployable Traps by ciedeeh

This will let you set traps before sleeping for any would be surprise-attackers. This raises the immersion level, and helps weaken enemies (if hit by a trap) when they sneak up on you.