I would like to see any option added to the schema browser list of users to load. When you open the schema browser, on the left hand side, the top drop down shows the current logged on schema. If you click this drop down, and right click in it, you see the options shown in the screen shot below.
Since Oracle 12.1, there is a new column on the dba/all_users view named oracle_maintained. If the value for this is Y, it is a built in schema. I would like to have an option to show only the non-built in accounts (select username from dba_users where oracle_maintained = 'N'), since these are the ones that contain my application objects.