What I'd like to see is the (circled in blue) Nav bar available on all pages, especially with the option to change the desc from 'Full' (as it stands) to Icon and/or Title to minimize it's use of space.

This would be handy even/especially in the areas of the site shown below the 'Useful tools' bar on the Nav menu.

an open/collapse arrow for everything from 'tools down' would he handy for the casual browser.

Perhaps General/Mature with the option of 'upgrading' (for lack of a better word coming to mind) Mature content to containing sexual, fetishistic, and/or violent themes separately?

It bothers me that we treat sex and violence as the same thing.

At worst it would create

mature/violence

mature/sexual

mature/fetish

and the mixes thereof.