Any amazing mods you've discovered that you couldn't imagine playing without?

Greetings, fellow n'wahs

I'm modding OpenMW for the first time so I can enjoy my yearly Morrowind playthrough.

I've been picking and choosing mods for the lists on their site, but I was wondering if you could suggest any mods that may be a little more obscure/subtle that have added a lot to your immersion/gameplay.

I have all the essential optimization/bug fixes/enhanced textures so just looking for mods that add flavor, immersion, or quality of life. thank you!

EDIT: thank you so much for the excellent suggestions. I've got my work cut out for me!