So I started playing Skyrim on the highest difficulty... made a Nord. He's gonna be all sneaky.
The highest difficulty is the only way you can get the most out of a stealth build.
I made a dual dagger assassin build on adept, it was very fun for up to like level 20-25, cutting throats and doing instant 1H kills from behind. But then my 1H increased to a point where I could just run up to enemies and slash them to kill them, and it felt pointless to go stealth when I can kill them just as easily rushing through like any regular melee build.