First, I really like the drawer; please Allan don't do anything bad to it.

I would like it even more if there were a way to filter the drawer listing. Most practical and useful to me would be an ability to create a list of file types and folder names to either include or exclude from view in the drawer.

Beyond Compare (a regrettably windows only directory & file compare app) does this by means of a list as mentioned above. You are also offered the possibility of filtering by various dates as well as file attributes. Please see attached screen shot.