I have made a fun char, with light armor and two-handed and then ontop of that alot of magic. Eventualy gettting silent cast, and then using destruction for traps and the fire around your char, and as ranged to pull and when needed. Alteration for defense and restoration to heal. Illusion is at 50 just from muffled, and conjuration has gone up too just from soultrap.
Anyway, I am playing on expert, and it's a decent challenge, except when I get oneshotted out of the blue. It really annoys me, I breezed through a dungeon, then at the end a deadlord, and I think okay a good fight. The dude one shots me with his shout...! and almost kills me with an arrow.
I leave the cave, and I get killed by a scavenger.... A few bandits are very dangerous. And the opposite to this is bears and trolls that are a walk in the park, and some mobs that are a decent obstacle in the light of what and where they are. I use deadly dragons mod and dragons need to be adressed and taken serious, and thats fine. A couple falmers shooting arrows are a deathtrap too.
So it's either way easy or hard in a way thats no fun, and which it is is just arbitrary out of the blue I feel.
If I lower the difficulty to adept, it's numbingly easy, and I end running through dungeons and using my stamina on my altkey. No challenge anywhere.
So why is this, that the difficulty is so badly implemented? I end up jumping from adept to expert and back in a way that ruins all immersion.

) and I would just run through everything getting the sneak bonus from bows (and then daggers after that, up to 30x damage and then the power attack comes in. Seriously OP). Second was a two hander, used no smithing/alchemy/enchanting, and only Orcish armour (he was an Orc). Even like this, I never met an enemy I could not beat. (All of these are on Master, anything easier is dead boring for me). Third was a mage. It was the hardest of the lot, I had to use enchanting, though I didn't use the 0% spell cost abuse. Fourth (and current) is a duel wielding Argonian. Master difficulty, modded armour/weapons equivilant to Steel, with 50 smithing (to make those) and thats it, and I still haven't found an enemy that was impossible to beat on Master.