I don’t really obsess about framerates myself and I’ve never had the kind of budget to have the latest and greatest parts but from what I’ve seen, somewhere around 30fps is fine.

And even though you didn’t ask, the last setting that I ever sacrifice is draw distance. I’ll turn down textures and shadows and reflections and everything else before I sacrifice draw distance. I don’t need realistic graphics to be able to immerse myself and have a good time. But things popping in and out of existence in front of your eyes are the ultimate immersion breaker for me.