Underage content is my only no-no. Everything else is okay, even if I'm not personally into it: if enough people request them, I'll make them. Even in the current game for example, I personally have zero interest in gay and shemale content and very little interest in incest, but I still include them (although my MM animations are probably shit
) because I know a decent % of the players would want such content.
If you look at my modding history, I've done some pretty hardcore content like bestiality, rape and slavery.
As you said, I built the game to be highly modular (and moddable) for this exact reason: people are very picky about what they're into - a fetish for one person might be a complete turn-off for another, so the ability to turn on and off fetishes is crucial to a lifesim like this.
If I were to make a game purely out of what I'm personally into, you would get a female protagonist game where the player constantly gets gangbanged