[arealperson]

Sane defaults and extremely detailed configuration options can coexist.

Those users who like the sane defaults can just stick with them. Those users who don't like those defaults can use the configuration options to fine-tune their experience.

[bkor]

If you have loads of options it can be almost impossible to know the options. Even basic things can be difficult to find. This is usually "solved" by things like an "advanced" button but that means you'll just end up clicking the advanced button in loads of places.

IMO sane defaults and extremely detailed configuration go against each other. The detailed configuration makes it impossible to find the option you want.