Curious, what's your favorite kind of mod? For me it's the first option, adding dimension to a significant aspect of the game. My favorite mods are overhauls of childbirth and education. What about yo...
I use mods to just tweak things here and there (I use MCC and UI cheats mostly), and I use bug fix mods. I don't have anything too major. The only gameplay mod I have is the Simda app.