I remember I really liked Morrowind at the beginning but as I progressed I noticed 2 things:

1.you could fake progress your skills/magic by casting/performing activity by yourself

2.enemies leveled up with you which completely destroyed the whole point of leveling and the whole RPG aspect of it

Eventually these 2 fundamental flaws proved to be too much so I just stopped playing mid game.

I heard that same thing happened to Oblivion so I never even tried that one.

I really wish they could work on Fallout 4 instead, lasers and guns dismembering in VATS never gets old, but now it could have much better animation, laser disintegration effects and consistently coherent camera view.